Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b1eebdd6f3e8f0…

MALICIOUS

PDF

59.3 KB Created: 2020-11-24 03:56:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8004964ca90cd0a34dae7c8ea1aabf90 SHA-1: df0a7e81aa5cfa643ae232b9946cb04a8fe7235b SHA-256: 10b1eebdd6f3e8f0ef7ddfa3b9370c7579d112fa66afec4527685bf156213a8a
154 Risk Score

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 0.9996

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://gettraff.ru/strik?utm_term=oh+say+can+you+say+dinosaur In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405413/normal_5f99df7570987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419828/normal_5fbc6517a8160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414156/normal_5fa7fd407a4ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5f8f0a179159d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_5f94230a8029c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5fb2ce90cc34c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5fa9d42b41f24.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/8fe5f0b5-22a4-4611-aa93-3a441fca5def/lejutoruda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e4e7778-c19d-4853-9fa4-49a7dc4153df/army_training_sign_in_roster.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/ott_light_desk_lamp_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kugufitel/selective_distribution_definition.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_off0000adf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADF2 5124 bytes
SHA-256: aa0f439145e689811e07c32fa01690b67956841b74ce6c1a4a651e3060517903
font_01_sfnt_off0000bf58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF58 9752 bytes
SHA-256: 692f1d9736c406e3c519854cfb9fdf85aec5621ad5d92db51f2fd432b51b2620