Malicious PDF — malware analysis report

Static analysis result for SHA-256 076642b13bf54f77…

MALICIOUS

PDF

73.7 KB Created: 2021-02-18 21:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d20fb3849766c0b3bd43454f44f6ebe3 SHA-1: ec7e6ed9ce75f52d979415cfd27ada15192bc4da SHA-256: 076642b13bf54f77361f8caf6e23b44e3ae15ad48081f01b3a8c337e03ccbc80
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and utilize UTM parameters, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=tommy+igoe+groove+essentials+2.0+dvd PDF link annotation
    • https://cdn.sqhk.co/ropulufira/cgggcgc/superhero_fighting_game_pc.pdfIn PDF document text
    • https://salizobujexi.weebly.com/uploads/1/3/5/3/135325558/3301075.pdfIn PDF document text
    • http://baltika-trans.com/wegedelegoa7pzm.pdfIn PDF document text
    • https://vizazifikoj.weebly.com/uploads/1/3/5/3/135327449/607a92c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_6026e7833925e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480423/normal_600beedb8c23d.pdfIn PDF document text
    • http://lazadacostumercenter.com/linear_piecewise_defined_functions_worksheet6mj80.pdfIn PDF document text
    • http://nncucuucuc.space/nobomanuguvufamowesazega0vk.pdfIn PDF document text
    • http://rozefuzapotor.iblogger.org/rawanede.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/8ghogcN/monthly_idol_coupon.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://tisenunab.rf.gd/52649479414.pdfIn PDF document text
    • http://wizuwevamonet.rf.gd/96612927170.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E5 5352 bytes
SHA-256: b91f3a5b33902e1bd4eb93671c523acec3dd02c0fd631f067c1cf7510b2867f3
font_01_sfnt_off0000e60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60B 11064 bytes
SHA-256: f8fec0ce34e58ab67dc7b9edd06d4b86970477a1a5edaa22374573fda4073485
font_02_sfnt_off00010bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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