Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ed310528a3d421…

MALICIOUS

PDF

70.9 KB Created: 2020-12-27 01:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 90f119444c2f6ee1f31292d7ce9d5f7f SHA-1: 1a4e1a8f6da391887be6af1e499f49b021232326 SHA-256: 63ed310528a3d42150446cd0e6504370776ba49749f6487d3f0c7bc00d8e827d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URIs, with one pointing to 'trafffi.ru', suggesting a phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to malicious sites.

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
  • 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://trafffi.ru/strik?utm_term=carriage+hill+farm PDF link annotation
    • https://wetebaxa.weebly.com/uploads/1/3/4/3/134343617/bapumi.pdfIn PDF document text
    • https://cdn.sqhk.co/wezikinupig/agchdZh/wugasujokejuvuwubus.pdfIn PDF document text
    • https://sebidodeg.weebly.com/uploads/1/3/4/4/134438526/fanemiz-zufemi-lijixub.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/gezuteja.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/gFmRhhl/pinudikejivudilowosisuzu.pdfIn PDF document text
    • https://lisokafi.weebly.com/uploads/1/3/4/6/134694643/e9070708fe909e.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/djbidib/victorinox_inox_diver_watch_review.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/1eb33c52-afa4-4318-b62d-a8fe32e17bbf/zizitomogurapitu.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/anambra_state_university_post_utme_form_out.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/stephen_king_doctor_sleep_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/wavis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c215d9-1dc9-4c97-8ef9-1c47d772751a/rogatid.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_off0000db16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB16 4908 bytes
SHA-256: 3ef5920084c1ff59a548e630cd9ee57a8518b36379c4d6536a6a4e0f377b15d8
font_01_sfnt_off0000eba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA0 10300 bytes
SHA-256: e9230b67edbef49da4b2cb749dff6c780efe0f4532e8605b512269ad02767705