Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2504867dcea088…

MALICIOUS

PDF

93.7 KB Created: 2021-07-16 13:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: edacf2b19b1a37a175c4f16f3ed46df8 SHA-1: cc32160d28a792e82a2ffb49acd20e084c795283 SHA-256: 7e2504867dcea08821246cc37c890a787400711d468a0b1f51fe9c89e63f57ed
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a link farm pointing to various disposable hosting sites, a common tactic for distributing malicious files. The heuristic 'SE_CALLBACK_LURE' suggests a phishing or tech-support scam context, aiming to trick users into interacting further. ClamAV detection and ML classification strongly indicate malicious intent, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://sportnazona.bg/f/uploads/files/tobuzixaguk.pdf In PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af24f827907---26482696456.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/levukafunedezisokebowupo.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce8c2ae9db---kamadinovuburipemidafa.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/binukufunuxalazemaku.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160de96b32c1c5---46350997990.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/81767267788.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098308d07234---13894079605.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/1552c6e158a1a057b4b337a9960163ea/vifipivipubixevekaga.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/844oqr1a1fk0mjcis2im4btit5/werugikururoselaf.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a49999d356c---kepowovamuletosafepi.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/sonagab.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16096d3d19a118---75826418113.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/bufufufopamupipesotaxeret.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c239363fb2---17263883680.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609866d5dc987---74638550053.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3d39c0715---52620361374.pdfIn PDF document text
    • http://chouchoudauphongongtay.com/upload/ck/files/visuderavigovixobedezal.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/sezaboluj.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8f21bf520---95938802820.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/zadabibanafeser.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c607f98584---2150709825.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/4j3q1qiops6aet35prhvnj1d8l/mokeretofasoduwilemomisa.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/8790859223.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=french+verbs+starting+with+cPDF 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_off00010ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB5 10612 bytes
SHA-256: 65575401d245edb21ed4670aaab9d1f152193429377c140d6a325c081ea7d562
font_01_sfnt_off000122fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FA 18656 bytes
SHA-256: 6619319ee7a79123223d59d0768c0e0bfaae4020fcd784c2f6df67beb2c4c1b4
font_02_sfnt_off000152be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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