Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c70340ba97bf0e…

MALICIOUS

PDF

77.5 KB Created: 2021-06-12 10:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 84c8b67b95c159b61c189b88df517650 SHA-1: 586033924ecb3f05e4684d0c194e323d321df268 SHA-256: 89c70340ba97bf0e8e3caea30972d5a9d635c811edcf4363332531ba89502508
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pixomot.ru/pbw?utm_term=middle+level+ssat+practice+test+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449602/normal_6064029e28219.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455669/normal_5fdfc60bb510c.pdfIn PDF document text
    • https://kinimozudex.weebly.com/uploads/1/3/4/4/134498073/6615950.pdfIn PDF document text
    • https://guzoxufogoxuwo.weebly.com/uploads/1/3/4/0/134097696/tipunaxekarunur_gojaroput_gezut_pedemavujenugo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476595/normal_5fe1187ac4f0c.pdfIn PDF document text
    • https://xafafiseroferop.weebly.com/uploads/1/3/4/5/134525648/8c80275d69c75a3.pdfIn PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/fosijowamup.pdfIn PDF document text
    • https://bujubisagakib.weebly.com/uploads/1/3/4/3/134323903/7929309.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423462/normal_5ffff6513ada0.pdfIn PDF document text
    • https://roxogarafuxor.weebly.com/uploads/1/3/1/1/131164132/wawudolurog.pdfIn PDF document text
    • https://tenuwikenosex.weebly.com/uploads/1/3/6/0/136082269/wewomur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413718/normal_5ff56d001a8d5.pdfIn PDF document text
    • https://doliwalesi.weebly.com/uploads/1/3/0/7/130776147/nafesemib-xefijugu-wedurini.pdfIn PDF document text
    • https://tizirabavapamob.weebly.com/uploads/1/3/1/4/131453045/4865282.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ronakiko.pbworks.com/f/nukedijaxor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0489341c-f798-4e22-aba7-ce6138ee8043/partial_differential_equations_evans_solutions_manual.pdfIn PDF document text
    • http://gutupum.pbworks.com/f/75514782508.pdfIn PDF document text
    • http://ropotupi.pbworks.com/w/file/fetch/145159971/anand_and_chatwal_inorganic_pharmaceutical_chemistry_download.pdfIn PDF document text
    • http://bezagodo.pbworks.com/w/file/fetch/144719157/what_are_the_importance_of_knowing_electrical_symbols.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/w/file/fetch/144527613/wwe_smackdown_here_comes_the_pain_free_download_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24217514-d3f2-4c9c-9d3f-92d258c56d9f/los_trabajos_de_persiles_y_sigismunda_miguel_de_cervantes_resumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60374f0-a7c8-4a37-a27d-4a0211a89f82/all_fish_in_fishing_book_fortnite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/474540f1-44b1-45e8-95bd-610a7f879147/dairy_free_egg_free_chocolate_cookies.pdfIn PDF document text
    • http://tesesazef.pbworks.com/w/file/fetch/145058787/duvawidativomozarixurisu.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E6 5212 bytes
SHA-256: 8edc87b9115dc9ecdfb25b6fdb04e9df7c996452c7e68fa543c3b4410c129949
font_01_sfnt_off000102c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C8 11176 bytes
SHA-256: 35daaee93cc5cdad2e1582302ec5bd8d88ed7e6fed7d4819572c2c37cba96219