Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3ea0e249d8e110…

MALICIOUS

PDF

80.0 KB Created: 2021-03-14 21:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d88ab3cc9bd05a851e52acd21ebe1fdd SHA-1: 26385318e7f22173afb657e6ce6e0a44ae4a1e2d SHA-256: cf3ea0e249d8e1107a6b8e32567e3d9c787801984199886f132d9926c75ded18
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm designed to redirect users to external websites, specifically mentioning a lure for pirating software. The primary malicious URL identified is associated with this redirection. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to drive traffic to a malicious site, likely for phishing or malware distribution.

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://gimoguvi.ru/strik?utm_term=how+to+pirate+minecraft+java+edition PDF link annotation
    • https://cdn.sqhk.co/totuzilexif/gdjiifB/loridobunugoxopel.pdfIn PDF document text
    • http://tibetterrier.ru/south_beach_phase_one_grocery_list86j2c.pdfIn PDF document text
    • http://rafale.store/area_of_parallelogram_worksheet_with_answersj1r2c.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/aghihmG/gumball_and_darwin_new_voice_actors.pdfIn PDF document text
    • https://xufaxasevejanog.weebly.com/uploads/1/3/4/8/134886042/dizuxizirasopi-bonupos-dibomozasafobub.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefaxeker/C8hghh8/zuluxu.pdfIn PDF document text
    • https://gajevorotaro.weebly.com/uploads/1/3/5/3/135329880/2138807.pdfIn PDF document text
    • http://santecmb-sarl.com/sidifixusin6lpgx.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/ibhchb5/45150700055.pdfIn PDF document text
    • https://dopezobobuk.weebly.com/uploads/1/3/4/5/134503431/ruzod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd0cb8e-fa89-4068-90a6-ed7bf692ecd0/jenasafevukosizejeso.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/17986171839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65911e42-9b04-468e-9686-68855f7bd9c6/jebefafetugozuxevagedudu.pdfIn PDF document text
    • http://nidexivoji.epizy.com/7906756805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/579cb0c4-0482-4fa4-aa7e-744e7c0882a5/cuisinart_k_cup_coffee_maker_leaking_water.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/wamorujapivakexi.pdfIn PDF document text
    • http://sobuzazan.rf.gd/guidelines_for_content_uniformity_of_tablets.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB37 5280 bytes
SHA-256: 2b89bdb1bd28fb75ced13b4f13962bd4b4f88eb1a4f430000466c9912f8a2df7
font_01_sfnt_off00010d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D34 10888 bytes
SHA-256: c43082db2c27844f1855981c9262250e444bad59be975f01b40e874cc87a2af0

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