Malicious PDF — malware analysis report

Static analysis result for SHA-256 472b14dd4938166d…

MALICIOUS

PDF

80.9 KB Created: 2021-02-19 10:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 04d5d2ba3d3be90f3cb1c47abb78a57f SHA-1: 96afa0bc8d073c5a9aaefc6253170828ca53fcd0 SHA-256: 472b14dd4938166d4d21412b8d0d625cf7928c8051c5dfc7750a44e0e52f7b18
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to drive traffic or host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://jacksth.ru/wix?keyword=gta+5+apk+mobile+apk+obb PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379970/normal_5fe4bd7109142.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369631/normal_5fc5c6d2a27b6.pdfIn PDF document text
    • https://tewamuwomipatus.weebly.com/uploads/1/3/0/9/130969874/zilot_rerekikugefuzi_solobazupuj_wogab.pdfIn PDF document text
    • https://sepetumeba.weebly.com/uploads/1/3/4/6/134601334/pemujewigolosurebexo.pdfIn PDF document text
    • https://sujarazigis.weebly.com/uploads/1/3/0/8/130813042/1906064.pdfIn PDF document text
    • https://vewuwoxefi.weebly.com/uploads/1/3/1/3/131379256/riwuviluzixudi_wijon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416143/normal_5fdb81911cda7.pdfIn PDF document text
    • https://betozuwozoz.weebly.com/uploads/1/3/4/1/134108580/gojagejudegeji.pdfIn PDF document text
    • http://tulimosigen.22web.org/honda_power_equipment_eu3000i_inverter_generator_for_sale.pdfIn PDF document text
    • https://feveronibamuja.weebly.com/uploads/1/3/5/3/135300243/1552660.pdfIn PDF document text
    • https://vuvuzuvikedatun.weebly.com/uploads/1/3/4/5/134529562/8700835.pdfIn PDF document text
    • https://rizizisexulap.weebly.com/uploads/1/3/1/4/131407181/fitukutuxafuzunurewa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418973/normal_5ff63a71f0eac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/eve_online_asteroid_mining_guide.pdfIn PDF document text
    • http://vafidufetavum.epizy.com/iso_45001_audit_report_example.pdfIn PDF document text
    • http://lixejezi.epizy.com/amman_bakthi_padal_masstamilan.pdfIn PDF document text
    • http://vesunebujel.rf.gd/mopixutuwunarolixizaxiloz.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/31022835469.pdfIn PDF document text
    • http://bixoravu.epizy.com/bloomsbury_academic_style_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CC 5048 bytes
SHA-256: 7e7a180601cc9beead3ace75cd028dcaabf88c66ae0ac1878c76d1981e03b79e
font_01_sfnt_off000109ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EA 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00011277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11277 10488 bytes
SHA-256: 0de63944e2214876deaf9fb37b88bb6b10c00312c06e86c72abff095815e7f02