Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b848b6314702e8…

MALICIOUS

PDF

71.0 KB Created: 2020-11-23 20:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 50548a77fb8114776ff579a9ca39a914 SHA-1: de3a8698a6ccb1a73859b8812601927197768c8b SHA-256: 22b848b6314702e8c91c97588a79761e172d3798b01c6665734574f5080ae628
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 0.9975

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=the+penguin+guide+to+recorded+classi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417408/normal_5f9874ac596e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415291/normal_5fa3dd9077ce1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501361/normal_5fb43f69acbd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387035/normal_5f8ccd501f276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487618/normal_5fae965174f61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f964e892c30b.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/fafd2c66-319a-4bd1-8e77-c1d5e0905549/gikoteforoxig.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/biblia_agano_la_kale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acfce8cc-e1e2-4b8e-9167-6c4c47dd9a70/27121196917.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_off0000d6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E4 5284 bytes
SHA-256: 8e688b19db8d4254738eaf2d42ae3a212a140e71424a23ef5733d52eff4d33d4
font_01_sfnt_off0000e8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D7 12016 bytes
SHA-256: 0ac107856820978bd8cd898ebd5144fc670130d5ec836c7a003b51bc4492b8fa

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