Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6afa1b246fba673…

MALICIOUS

PDF

173.7 KB Created: 2021-07-08 08:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe3f815bd490f67f15d94eb0b70c4067 SHA-1: b8aa66f0a1e6502c513718a67212bfa1f3ffbaf3 SHA-256: e6afa1b246fba673d97c8060e232f2e8ced6435ecaf50d92a6fb5c7441a38b07
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites, likely for phishing or malware distribution. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, as does the SE_CALLBACK_LURE heuristic suggesting a potential tech-support scam or callback phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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 http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc102d74d5---zadosapofepisenifiloziz.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/9243861ff995e5e7fed0bb579ce5f17f/pebemumu.pdf
    • http://adabaskimerkezi.com/upload/file/mufoxavogasede.pdf
    • http://kashima.cc/userfiles/file/34386231080.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088dbbf21345---78283048143.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/7lh9kq5p60m8k1asgnjqjlnq61/wanodapa.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bdff89790e2---boxowefavek.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd235fb7842---lipeneriwagazij.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608702e76bd31---tawabimi.pdf
    • https://triangle-electronics.com/assets/userfiles/file/4884544666.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072ad3f2e1c4---25583643651.pdf
    • http://red-persimmons.com/upfiles/editor/files/kefulusakunutekixad.pdf
    • http://maxtarget.by/ckfinder/userfiles/files/90453730176.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/6ec0889df7864080bc93aa3f33cb456c/76120310982.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607482c8cbd18---mitemogu.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c4d267993---taxasadaxelajajube.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f465d30daf---64013370740.pdf
    • https://an-professional.ru/img/files/file/nofukewitopawodibetav.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/e2b938d8768276c162918d968d664d0d/penoziwujexokutidiwudepa.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607ef1e74920f---wuzuxozezif.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/0d982eecd3e555db1f40a02ed7e0f19e/nelow.pdf
    • http://inspiredindianfoundation.org/uploads/99904054355.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/e89f8f1b558d23d8c79c8b8090a0b596/sasebizewu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=sentence+with+word+although
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002493f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2493F 16792 bytes
font_01_sfnt_off00026156.bin
c22923ad09ca3a90ed0f571d646af239455d4323117cc46e7e95a85e8562ab53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26156 10740 bytes
font_02_sfnt_off000279d0.bin
7aa351dbbc42eb78eab484eab1fd7240c3cac4f1ea5caef12568685517d2064c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x279D0 17628 bytes

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