Malicious PDF — malware analysis report

Static analysis result for SHA-256 aff2078fc94d48c1…

MALICIOUS

PDF

65.9 KB Created: 2020-11-19 02:45:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8ac0aa80ff2f3f01ed94eadfb9fbfff3 SHA-1: 23b05202af8ec8472307342189a878b5232befb6 SHA-256: aff2078fc94d48c12434a00d0bd756a65665576aeff49960fee2a9c0e838fd56
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/strik?utm_term=introduction+to+engineering+experime PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387218/normal_5fae0ae2bf235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402478/normal_5f9cf762e469d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5fa050b815757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408984/normal_5f98708e00c40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f9348d727fd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_5fa1635aacd6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387412/normal_5faa55d8f3cec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f8aa849556ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425238/normal_5fa4f475219e5.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/4116d1d8-b3ad-408a-9943-1bb6220f8ed9/tejomo.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/chapter_4_project_making_pedigrees_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da56f56a-5a22-4fa9-84f6-76d66a509661/dovunugatexapojimune.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/niwona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef426858-2a1b-4800-9edb-d7026b31642b/63360760802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16654bbb-389e-41e9-9c03-2eb7c1c27787/buzedi.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_off0000c6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E0 4976 bytes
SHA-256: 1a2fe7638200fa323f9856da0bd7879f528d5c5e07220f527ba7f6f0d4edc089
font_01_sfnt_off0000d7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BD 10396 bytes
SHA-256: 0bc99e5e09d851fa9f8f0f54ee60cb35eef61af834fc76f1cb0e3419d407eb24

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