Malicious PDF — malware analysis report

Static analysis result for SHA-256 7541baa7b0b3542b…

MALICIOUS

PDF

66.0 KB Created: 2020-12-15 14:12:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e690f1192dd4df9a670b4cf43abc6034 SHA-1: 3f44790370346cf4fd2a6e0274f4584d562e7030 SHA-256: 7541baa7b0b3542b121906753fc9e9d8890f2c7913f0815f8e4f573abf91e799
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafficel.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Voice call app' and 'wkhtmltopdf', suggesting a lure to a potentially malicious service.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/aws?utm_term=voice+call+app PDF link annotation
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/gabakovolobi_jadezoranededo_pamomug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5f983c20b624c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5fba0adad5644.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/5fc28709affbf90a66f4d793/t/5fd06ae55347e801a820490d/1607494374434/431355924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed62e421-daaa-4327-a237-5f0a18bdca7a/ketizevo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e46f24b06a7eb3ff1788/t/5fc1af729d79364840cd17aa/1606528883823/69868613585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d087db73-65ed-48d5-81e2-8c9e2074d3d7/wow_archaeology_mounts_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6112f81c9a2a0c99de0f/1606377746816/50802027525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e163660-a60a-406a-ab9d-8834c9da0f31/fat_baseball_players_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4662380e-5dc2-47e4-a333-e54a19648639/4950035405.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_off0000c7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BF 4620 bytes
SHA-256: 76ac46a1ca8ca09bfd58ad61204ae1122aebb95835c69284759736f73d1c7255
font_01_sfnt_off0000d792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD792 10612 bytes
SHA-256: c2bf97b80deba24db9be073985afdd9b95a7827885850a67a51d9a6a97ff44fe