Malicious PDF — malware analysis report

Static analysis result for SHA-256 b36b6a506f612ded…

MALICIOUS

PDF

70.6 KB Created: 2020-12-26 20:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bebeaaca6de3f7d258b78900421139a5 SHA-1: 3a70ddf0f636d0c30b6c7a193e7c42f6a4c0e36c SHA-256: b36b6a506f612dede8cb60c9bc284375921fda3cd67abf300ec191dc26dc7bd3
154 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 routes users through malicious redirector infrastructure. 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
  • 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.
  • 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://traffmen.ru/aws?utm_term=synthesis+of+hexaamminenickel%2528+ii+chloride+lab+report In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382960/normal_5f8fefbef1fd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375907/normal_5fc172847fbc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424009/normal_5f9f719c859c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415068/normal_5f9940ecc7310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420599/normal_5fa48ea08547f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f894499d051d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_5fb42612a4e9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385863/normal_5f8df98ea2629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_5f9aec0a9b80d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_5faf669f31a34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446773/normal_5fa43907b9354.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/02a78514-47b5-4f41-ad15-3e888bace3b7/98951794669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30d20794-1ba1-4a7d-912a-a1820eefe923/korean_war_weapons_marines.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/nibaresowipajapewegika.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/78616295821.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_off0000cb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB58 5948 bytes
SHA-256: a90209be09d2a3b5321d9a8517f442daa1aea35131df0094115bf1a3912a53a8
font_01_sfnt_off0000df7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7E 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000e80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80C 10608 bytes
SHA-256: 26011d011e5b37fae47e80b04d98be5544f77906f490b9db44de6034ff99ee24

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