Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb36d83f109d955…

MALICIOUS

PDF

69.4 KB Created: 2020-11-25 20:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4a0808690e3fe1856551e5804f4c2a3d SHA-1: d3dc28af3900189f88c5838bcf1c0c4f6ec97f29 SHA-256: 0cb36d83f109d9558d3f9731fcbb789bc4ec2d4d731e74b20034cf4f842e71dc
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 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=sandman+slim+series+review In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5fbc8bc227772.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/6d59f783-4c8a-4c52-bc0a-dd74c3b2aa94/giworejoretowunibakupow.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/biquad_filter_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd8f666-2235-4905-9871-7e01542db0dc/49871578678.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/nanusakumatumek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43701a4c-d450-4887-b9aa-60225e3fa386/13529509527.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/tuxesutalaz.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/smoked_gouda_mac_and_cheese_cooking_light.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/64493776193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2207ec-a0b6-47f6-af03-18c620ce89e3/medidas_de_polines_de_madera.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/pediatric_cpr_guidelines_2017_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/physics_2_final_exam_study_guide.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_off0000d329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD329 5228 bytes
SHA-256: e107ecd8dfa06952185eb7e43fe47c48bf09904524ef3ff4b506e48017025e22
font_01_sfnt_off0000e4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E8 10772 bytes
SHA-256: 39244e1d7dc51bcaff4928b17544a30e918c3cbbdc0d09c56200984fef3e8535