Malicious PDF — malware analysis report

Static analysis result for SHA-256 02fef5bd095e751a…

MALICIOUS

PDF

76.4 KB Created: 2021-07-10 14:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 931f6e421d5e52d42c2c9fbb27502804 SHA-1: 8b5cf6f1f9e6add71847c13ee6c7f220d992a86e SHA-256: 02fef5bd095e751a6d13526bd9330ee2e8b209fd65811ed3086ffe9748585834
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs pointing to various domains, many of which appear to be link farms or compromised WordPress uploads, suggesting a phishing or scam campaign. The heuristic 'SE_CALLBACK_LURE' indicates the document likely prompts the user to call a phone number in a context of billing, refund, or security issues, which is a common tactic for callback phishing and tech-support scams. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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) or Microsoft license-boilerplate 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://laborke.ru/uplcv?utm_term=unblocked+game+s66 PDF link annotation
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vapisu.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/fd5b05faabcc1339a168da050478848f/togoniwenitepa.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/matimiwawaf.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/63860108144.pdfIn PDF document text
    • http://zerosquareonline.com/file/78046698180.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7b443aa9f---94022205989.pdfIn PDF document text
    • http://chiari-web.com/ckfinder/optimist/files/zalumapaxuduzug.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2a2fc914f---femosubobow.pdfIn PDF document text
    • http://webinside.pl/userfiles/file/janumevofeb.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/52571409032.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd774bd18a3---botopinoxezuxojazur.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/70246563960.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/df2c5e9e6cec23bb3cf7125e392daf69/27514298095.pdfIn PDF document text
    • http://besttailor.info/ckfinder/userfiles/files/mupowolaxavu.pdfIn PDF document text
    • http://misspacificus.com/clients/873634/File/33517191318.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/c68ad162f78e9388c822f3ed062641e5/46930321755.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/5941c0297419b590279323f740c16a3b/bedetasododas.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1ec41382---57319846341.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/2d15e42cfbecf6203b4d80bc0bb69dd0/93590698468.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/89191681274.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077e6dd95cdb---70036918114.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/ravotojebuf.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/nidatupepamusevibod.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b41733b6---59998563149.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC780 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF92 16848 bytes
SHA-256: 47c8e80ab01520d83499cf271b42eb11ca90be6123e122837fa9ef1a517116f2
font_02_sfnt_off00010bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC0 10832 bytes
SHA-256: a5097a2004b33b4590acbe35afd785ca3dd95bb135618251d2a4ae59d33caa58

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