Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e50b00cc79c5c5…

MALICIOUS

PDF

91.2 KB Created: 2021-07-07 21:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 34544968773472152dcd4b756f6c2e7d SHA-1: 5712abe97b4cc5c91cbfba4e6d2835f16089da53 SHA-256: 68e50b00cc79c5c5c7fa96de22dda3f7c9ab2d3d29fa2a1e5b80d4a66e013ed8
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a callback phishing scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting an attempt to distribute malicious content or redirect users. The ClamAV detection further confirms its malicious nature, classifying it as 'Pdf.Phishing.Trojan'. No scripts were extracted from this sample, but the overall structure and URL distribution point towards a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://lncl.org/ckfinder/userfiles/files/72151943386.pdf In PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cedb38e75f5---47804349511.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/91471502209.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/4f72c3992daec60179d01da01595b20c/7555155108.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///92279892299.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/3618e7ae5795cdd5bab3aff43615ed52/wodar.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/87537312036.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca792b75d2---30183616384.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/zowexarabusupigiwitepeg.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210617191219.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/7hg55bm1ssntd96n5oc9hjjbs3/15116296670.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/3a05e06692ce33c24fe8333a0ed32e85/xikakikek.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16080df9442425---xatorafafowiroweposamogo.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afdac2501be---danupekodupem.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8265c6f51---varoxowogisumeb.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/dh0intk9lnqv0plahjppgrhiu3/71200575029.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcc4d68f34---76624939461.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/guwikunakeluriluzobibopi.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608efd27d05b4---63237180411.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/183ac400fb61d8d851d0f1c02bd22d69/ramozabuzegalirosulu.pdfIn PDF document text
    • http://ithaca1966.com/clients/8/85/85e9e0a76fddb83d7689cebc6ab07fae/File/basojarirupujagud.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/19789540309.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb2b3e6bf51---laguruxokixopotega.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=directory+enquiries+numberPDF 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_off0000ffd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD5 17992 bytes
SHA-256: 6e87480ce4b924883ad382cd2992b328eacbd880db00093ae1000b9e342bfa68
font_01_sfnt_off00012f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4B 10684 bytes
SHA-256: 5b1fc7988bfd667bd4124e86e6fae4d5a3221d6c776d2ff7d074b84d1be96575
font_02_sfnt_off000147db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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