Malicious PDF — malware analysis report

Static analysis result for SHA-256 3043929e3324eba9…

MALICIOUS

PDF

60.7 KB Created: 2020-12-18 12:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7abeb5dd52451fabffcabf9949d42f26 SHA-1: 1e5306183eb90bb5210ef1d504444dfe373036a8 SHA-256: 3043929e3324eba9625a4b171c2b2471d1aa4ed00ec19cd37b4d4e01aa59c289
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://traffine.ru/strik?utm_term=philips+norelco+shaver+2100+cvs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388280/normal_5faa3650b0bd0.pdfIn PDF document text
    • https://memesuxiti.weebly.com/uploads/1/3/4/6/134635319/6006757.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
    • https://uploads.strikinglycdn.com/files/4ee85403-865d-42d4-bb44-304a1089b543/gikuvaziworimosoro.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0df209955c744b53b696b/t/5fc413e66457125654bb7a40/1606685671691/rpc_endpoint_mapper_high_cpu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a245ee03-8454-4ef6-9857-2edb4dd53d9e/9037607719.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc01ccfc14dfd36feed28e9/t/5fc2258c1972c46e3ce7303b/1606559122278/copper_ii_sulfate_formula_of_ionic_compound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebbc768c-a79b-4396-a63f-d670bd8352a8/bulasibotiruvevova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3d7048-e79f-4737-9a17-2062fa348919/69893132688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f371ed71-7dfa-4848-910a-abecb275d59a/90084433800.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc524ddc30a162e0c6e120d/t/5fced4e87cc0b10a0abfb20c/1607390440487/fortnite_building_tips_xbox_one.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/equations_worksheet_sixth_grade.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_off0000a7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B9 5116 bytes
SHA-256: 66e053afa7d2587bf36d6b340e012bce77c1afa1e424d36225594f23d56a5358
font_01_sfnt_off0000b8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8FA 8708 bytes
SHA-256: 0597b66e238a9035c0310f82ce5830ecb9ffcd139dadfc5410af6ef69552b847
font_02_sfnt_off0000d6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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