Malicious PDF — malware analysis report

Static analysis result for SHA-256 03cac51e0f3f343a…

MALICIOUS

PDF

360.5 KB Created: 2021-06-27 21:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 080e3532d469a9448a3812dd15fa8bff SHA-1: 3234523cdadc8b1af4edfc15a9732ed53c073584 SHA-256: 03cac51e0f3f343a9d477a5ce27784bb3b61a516e81d140aa7c1238862eb5217
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file detected by ClamAV as a phishing trojan. Heuristics indicate it uses an urgency lure and impersonates McAfee to trick users into clicking a link, which is likely for credential phishing. The PDF contains embedded URLs, including one pointing to a compromised WordPress upload storage, and the ML classifier also flagged it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8633

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=realm+grinder+research+unlock.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ahkjt.com/upfile/file/33901466252.pdf In PDF document text
    • https://ilcaminodaugo.it/file/wajufibewegidek.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/78224281770.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/fa79e6e8735486359a9282d6c3f93320/vajutiwogoluxiko.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/19315808401.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072630cbf019---wazetaxokelenexuvumo.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/8651b687a292100e743afea07bcd6b3e/53142795164.pdfIn PDF document text
    • http://hhcreunion.com/clients/4/43/43f38dc94a4d709fe78decf5bd9d7370/File/7776250999.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/7ef2ab3454b9aedc2db5d4762728fb53/tivikifivirekojejugirutik.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/379d0adc23dfdbc1c44a6348279944c7/padaxavado.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/natamoge.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/23368528806.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/a0ceb18b0f9551f13e3f9f1598ba4293/fijifiwotifezuvam.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/32722276618.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e97721aa07---wurobefovadejenagenu.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/ru7qtv36b1t4l7jmt9ahs4d062/64625896653.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/mvurevhngfcc0gv7ol3n7h53ep/gonezed.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c77f1da2980---mubiju.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/zogulobovipu.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e52aaeccd---17908017131.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021052821512116.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82e8115c10---92994332507.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1608448433627c---begesoze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=realm+grinder+research+unlockPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004d31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D31D 26124 bytes
SHA-256: 896ce5be41a54674c61f07ee3a7ab91ea7bd902c367638799ab52315b3d23524
font_01_sfnt_off00051586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51586 16148 bytes
SHA-256: b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59
font_02_sfnt_off00052b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52B15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0005432c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5432C 10956 bytes
SHA-256: 066d2925acdc6e5de99b0020d7562844ed654a0b3872f7bf9a671fad303cea3b
font_04_sfnt_off00055c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55C17 17520 bytes
SHA-256: 25880c3a008e56dfa18966c2a9cc39db0ae2461d396330b3387109fc76a4d97b

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