Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f046d51824c5b7…

MALICIOUS

PDF

178.4 KB Created: 2021-03-30 12:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f94a619bb41ef81ea6e49bf730def01c SHA-1: 24c2dc3675c4e8d65681e4b6d141f586a5a36ef4 SHA-256: 30f046d51824c5b7b2a151e0d832d37c12273c749b46e9a9eba089dc3e7167c0
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'golowaki.ru', which is flagged as a potential phishing or malware distribution site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further suggesting malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://golowaki.ru/award?keyword=tan+number+application+form+pdf PDF link annotation
    • https://gakefutafo.weebly.com/uploads/1/3/0/7/130739004/lonumu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_60243fe27f0a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393639/normal_6045c7014ed87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468267/normal_6025eae056062.pdfIn PDF document text
    • http://rujigituta.iblogger.org/how_to_sign_up_to_become_a_navy_seal.pdfIn PDF document text
    • https://waxitajoxozaner.weebly.com/uploads/1/3/4/4/134474673/kodifetivokuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_60264fc67b5ac.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/bazevokojukavalenugagesaf.pdfIn PDF document text
    • https://wurivebufe.weebly.com/uploads/1/3/0/8/130874680/215dc22032134f.pdfIn PDF document text
    • https://vebuleme.weebly.com/uploads/1/3/4/3/134321641/fomakuve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493610/normal_600809ab2ea33.pdfIn PDF document text
    • https://vavuxajibibugu.weebly.com/uploads/1/3/4/4/134472661/3050982.pdfIn PDF document text
    • http://vetozadep.mywebcommunity.org/list_of_vocabulary_words_with_meaning_in_english.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pewaxoxepizus.rf.gd/dusemoxiwadadolabewide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84bb2720-1aa0-4e87-ab2b-0f88adc9d099/can_blood_pressure_cause_eye_problems.pdfIn PDF document text
    • http://gerosopidazab.rf.gd/cadence_allegro_17._2_free.pdfIn PDF document text
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_a76e1095a6f0437c9e5c73cc68ce9fd1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b0286be-b1af-4b4c-b19e-5f2be6808b83/how_to_fix_leaking_pressure_washer_pump.pdfIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_ed0bf5ad610e4c6da6d5ea0b742198f5.pdf?index=trueIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_b76917f46bee4a2ca69d481389135fa6.pdf?index=trueIn PDF document text
    • http://dikekonigexixa.epizy.com/deferred_tax_balance_sheet_method.pdfIn PDF document text
    • http://bovifuxabobi.epizy.com/presentation_template_powerpoint_picture.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_off00027e95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27E95 5212 bytes
SHA-256: 7fc74b95b4fffe9f7fef3729def5d8d08bcbe2f3413854f084aadd5f503d6a21
font_01_sfnt_off00029032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29032 14408 bytes
SHA-256: 9085c13958641927e6eab44587a73f338647d32101d00f710c8953aa4ef22e85

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