Malicious PDF — malware analysis report

Static analysis result for SHA-256 79634e5c95443072…

MALICIOUS

PDF

82.3 KB Created: 2021-07-05 22:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14ee3476bc9834c435132aea0266d8d9 SHA-1: 6e877ffc5f7497d432bd5a43c509ff2fa7f47815 SHA-256: 79634e5c95443072b2533bb2dd0f159bb1dcefb583ab2fac977b3a2b4566cc92
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm used for phishing or malware distribution. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=17+woodbine+ave+larchmont
    • https://nocenzura.space/web/img/podborky/files/70116403442.pdf
    • https://woodfur.in/userfiles/file/31086214625.pdf
    • https://bandotrading.com/uploads/file/85423927931.pdf
    • http://www.tramag.pl/upload/file/mojamezavilipaxi.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160aa52d13ad34---11700396883.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/1vuoorli7684a1cfnh0f3bahmi/8884914968.pdf
    • https://arrayamed.com/userfiles/file/sopirivijurumegupotupelox.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b06d44a62---96543442899.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d38083420---227059119.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae057da0f23---84108085523.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608b53a3281ea---85246359493.pdf
    • http://xn--49s538bo8ux8c.net/userfiles/file/rifatujamimagudigo.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b23a635fbf8---88749696213.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808b2bd96e8---97128152624.pdf
    • http://merwepizza.com/upload/file/renijuku.pdf
    • https://senhewood.com/d/files/90379988469.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ebf230966---lepawokanokexefa.pdf
    • https://stopserv.ru/files/file/31760012186.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bcea1c223ef---22260906404.pdf
    • http://agro-partner.com/Image/files/rukebanonosulopuxife.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bc2067750---58451517963.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/cuk2qk5h9poa2mdtdjga9q70h3/kirabafifekijoperirojari.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9fb0ca9f92---67650968034.pdf
    • http://sysquare.com/UserFiles/files/34824308132.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb7020c061---91922945189.pdf
    • http://abacusnancy.com/userfiles/file/bosavoladolugat.pdf
    • 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_off0000dbaa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAA 16792 bytes
font_01_sfnt_off0000f3bc.bin
165d9bf12e57f5e80cf413f484ca46787f445e611c309dcd6903025f45d345f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BC 17920 bytes
font_02_sfnt_off00012322.bin
c6fe181fd4340d58af38ec470ac76bd546fb2b2310fd0be749ae6f27fd59948f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12322 10764 bytes

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