Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac0739c56c7c05b…

MALICIOUS

PDF

86.2 KB Created: 2021-09-07 04:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e25cb514bcf82b450ba61a1ad215bc57 SHA-1: c10276dd7a9ef01f103dbc26dfad7eef12d29eaf SHA-256: 7ac0739c56c7c05b71831aef95777df5303548cac55084a09bcbdec12cae6d91
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous compromised WordPress sites and disposable hosting domains, suggesting a phishing or SEO poisoning campaign. The embedded URLs, such as 'https://drafthe.ru/uplcv?utm_term=tuberculosis+en+trasplante+renal+pdf', are likely used to redirect users to malicious content. No scripts were extracted, but the overall structure indicates an attempt to lure users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://drafthe.ru/uplcv?utm_term=tuberculosis+en+trasplante+renal+pdf PDF link annotation
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9326a84f48---98693909729.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/84060708073.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/68554425573.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/92pv71ka4flg8pir15lb5ofs1m/xurazizutajemaza.pdfIn PDF document text
    • http://bxbrdh.marketsearching.com/upload/files/72147687087.pdfIn PDF document text
    • https://media-get.com/userfiles/files/nisanuzomif.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/vufowuganelebubafuzedolev.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160eca0432cf6f---59426212097.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/u5saa0qjou36rt1jh8susf6jd7/4221122925.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bf9b888e4---jiwubuvazen.pdfIn PDF document text
    • http://salkim.com/userfiles/file/zumukapunifovejepedipi.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/80701379081.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/43944981061.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/95644207644.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/wejanatatevolipuxat.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/zafijaju.pdfIn PDF document text
    • http://geoman.cz/data/file/60666838722.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/dimuf.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/933f8e364929df5f4abcd31542bc6138/vinerukiwez.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/251632t60bqvt1aliob3n95f45/zunufavaruwe.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/tumutobakugupivuwa.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/38677779535.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D0 10816 bytes
SHA-256: e5873ca72a81e367d893105a38e7dc847a357eed275aaee4dd1900abbf06292a
font_01_sfnt_off0000fca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA1 20644 bytes
SHA-256: 6bcdf1af115c1bdb19549e57bf10cccb90816afcc7914f021e730925370e20d8
font_02_sfnt_off00013380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13380 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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