Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ced6018db0d5ea…

MALICIOUS

PDF

68.2 KB Created: 2020-11-20 08:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 06dd54aae483d853f545e1e4300081ba SHA-1: d95a2cff37c4e148045a02b558274e8d50060f74 SHA-256: 92ced6018db0d5ea0f63611cbf4e2c892b55cd98c70d7d426761b4cee9a43f01
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting services, suggesting a link farm designed to drive traffic. One of the extracted URLs, 'https://ggtraff.ru/strik?utm_term=pile+v.+pedrick', is identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=pile+v.+pedrick In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_5fa0f318547e3.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/xapelibofatifor.pdfIn PDF document text
    • https://zuragani.weebly.com/uploads/1/3/1/4/131438510/misokif.pdfIn PDF document text
    • https://vowobonu.weebly.com/uploads/1/3/4/8/134853209/0a4f9.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/1069874.pdfIn PDF document text
    • https://miwavexirafixi.weebly.com/uploads/1/3/4/4/134495851/remisozeva.pdfIn PDF document text
    • https://risimapi.weebly.com/uploads/1/3/4/3/134321435/namixovexi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408463/normal_5fa706e896893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5f8a95ebb752e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377401/normal_5fb262d8e3c5c.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/fd2ddc5b-ef3c-4e2a-be10-020104d39f49/free_study_guide_for_ccent.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/ielts_test_british_council.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de1c20c-df51-4224-8989-1eefd2cb6e3f/putlocker_the_hangover_2.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/columbus_clippers_injury_report.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_off0000d051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD051 4836 bytes
SHA-256: e038899d8604115a11ff56f6887342cc5f6928fd3ff77343377f7a4e8107bd52
font_01_sfnt_off0000e0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E5 10344 bytes
SHA-256: a37b3f80be254e84379059c49ae0b32f7359a518acbf84bb652e5bf0a37efa69

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