Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b343cf1355b664a…

MALICIOUS

PDF

77.5 KB Created: 2020-12-10 02:06:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d928d28edec330a359fa58bee5884836 SHA-1: 184cd92da934d28f838d8001606d67e76c760573 SHA-256: 5b343cf1355b664abf891503f7ed98f72eebc36b8bd1c6653232b6aed7090dfa
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 0.9997

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://trafffe.ru/123?utm_term=animal+system+interactions+worksheet+answers PDF link annotation
    • https://gafapelisepofas.weebly.com/uploads/1/3/4/7/134762307/1956779.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415756/normal_5fc883eef1b58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382962/normal_5fc9a7d777c74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448121/normal_5fbcf259474eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380858/normal_5f9246ffb2189.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc57b5d5bcb0228a2a17c6c/t/5fc844d7b74dd54858d2c915/1606960347104/lightspeed_mobile_manager_support.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a02536-0678-4601-b8fd-a10708d3aa30/k7_antivirus_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/anglo_american_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c036331-fd68-4ad4-bf5b-a423095e3e2d/rotorekiwovuve.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/jatorasowaximakanu.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_off0000f31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31B 5288 bytes
SHA-256: 60cccb54f4440c46e3a0203c7535ebea97f9bc958337431211f2272b3fe7b511
font_01_sfnt_off000104fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FA 10664 bytes
SHA-256: 89514b1b60c3fe202469752121a091cad1fc3a560545b4df325d7563a876a8e3

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