Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ab1cef1110f6ba…

MALICIOUS

PDF

86.3 KB Created: 2021-05-12 23:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f86fa0f02a0b945507d9c2d64ecc8b14 SHA-1: f8de5a4f77d2604c63ea6f77b6bb826e9bd4d741 SHA-256: 05ab1cef1110f6ba3c847c82f7dc74f286169067ddd60b696b97889a0c07ea8f
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to network router configuration, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://nipisod.ru/strik?utm_term=where+is+the+wps+button+on+my+netgear+r7000+router PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368237/normal_606e025d11b0e.pdfIn PDF document text
    • http://instapodarok.site/kalar8n892.pdfIn PDF document text
    • https://lutapojedexom.weebly.com/uploads/1/3/4/7/134747239/40efbb.pdfIn PDF document text
    • http://giocodigital.fun/21475937917xq5yf.pdfIn PDF document text
    • http://m-laskin.ru/777552359575jwlr.pdfIn PDF document text
    • http://italia-doc.fun/twilight_2008_full_movie_tamil_dubbed_free_download_tamilyogifzvsy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_605b4cfbaf1c5.pdfIn PDF document text
    • https://makesagesuli.weebly.com/uploads/1/3/0/7/130740055/5076524.pdfIn PDF document text
    • http://wexuxeretul.22web.org/6th_grade_ela_worksheets_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_5fdaa8cdc3f26.pdfIn PDF document text
    • http://xevedudox.sportsontheweb.net/14794003056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_600c75c48bcec.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/bissell_crosswave_pet_pro_spare_partshdvtd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vavijirodujozi.rf.gd/computer_systems_analyst_job_responsibilities.pdfIn PDF document text
    • http://movuzawizigevej.myartsonline.com/tanolajav.pdfIn PDF document text
    • https://7605d98d-8b17-4a41-9383-f5c8d5af9bcc.filesusr.com/ugd/2bed4c_7a165f572d6945fb8c428fd49a219deb.pdf?index=trueIn PDF document text
    • https://e012ec00-e8e8-475f-a96b-80cab2ad705b.filesusr.com/ugd/3f1139_9975d7125772472396d47c4423d7b373.pdf?index=trueIn PDF document text
    • http://marilineme.epizy.com/75590456517.pdfIn PDF document text
    • http://masokijedeneda.epizy.com/75759920289.pdfIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_abdda36d518b4b9f927a576a6146dd28.pdf?index=trueIn 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_off00010317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10317 5652 bytes
SHA-256: 3afca4dce8fa3ff55f54ba95f1e99bf047443d4345f39c0c89528128be97daaa
font_01_sfnt_off0001163d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163D 11656 bytes
SHA-256: a151002063fbc5cd88a5844ff503c40db710b41c5e0c46be048efb6bd25fee42
font_02_sfnt_off00013cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CBD 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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