Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0c80d32b8a0512…

MALICIOUS

PDF

80.4 KB Created: 2021-09-04 11:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bad0a5eed1f49665bdee740095bf6a04 SHA-1: 2b7ea65bceee1cb61edee246bb596cc7ba4c74d4 SHA-256: 1e0c80d32b8a0512720260a3c9cdadcaa4dab930529a5745cf865a9ef7d1791b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_CALLBACK_LURE' indicates it may also be used for callback phishing or tech-support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c832b0cf6f---77672677169.pdf In PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111e229c7880---satezamuxebamo.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0062e957a1---jirugedafaxipefave.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/wutekerekalixixosori.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/79023886115.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/bekup.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/44310482860.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/xajeputolaf.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/vixapodugimate.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be5e9a5cd7a---44579390725.pdfIn PDF document text
    • http://net-marketing.hu/images/files/27426733644.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c7b2d65b206cb7fc14b2c2b1105af0ec/zuwowi.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/4183934862.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf40a6c049a---gemozujedoditeko.pdfIn PDF document text
    • https://tahubunting1.com/contents//files/datexapepalunawojukepudub.pdfIn PDF document text
    • https://mszukam.pl/dat//file/zoxuti.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/a596182626cb568a51e639498dcf87c0/fukapaxe.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/26981683859.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/zatezidaluma.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/zigisamawif.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160876ad66959c---66970198790.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/vuwuvaveferijaduwufuz.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210524052324.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=3d+pdf+maker+for+3ds+maxPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD338 18632 bytes
SHA-256: 5ef50306df990baf9d0c34f07cc3ca72e883392202170d153e079dfc80146959
font_01_sfnt_off00010476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10476 10588 bytes
SHA-256: 7c45db290d7a60d83053730ca138ed6d4158179cc481a1d16ab603f12d6b33b9
font_02_sfnt_off00011caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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