Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56f7d9572b559cf…

MALICIOUS

PDF

77.2 KB Created: 2020-12-26 13:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 123463dddd45ab32dd4667866a175a48 SHA-1: 74301e03ba721beaca95697b8894c18ed825d563 SHA-256: a56f7d9572b559cfc87bd0b065feea1dc0c9fcc4965c90c13dae7a2381dcc436
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'trafficel.ru', which is likely used for phishing or to download a secondary payload. The document body contains garbled text but includes the URL and authoring application information, suggesting it was generated programmatically to obscure its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=chitra+vichitra+all+video+bhajan
    • https://static.s123-cdn-static.com/uploads/4444371/normal_5fe3e76335d40.pdf
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5f96ee4a01c93.pdf
    • https://static.s123-cdn-static.com/uploads/4385009/normal_5fdd3a913cb9d.pdf
    • https://static.s123-cdn-static.com/uploads/4469386/normal_5fdd86ae3a556.pdf
    • https://cdn-cms.f-static.net/uploads/4449984/normal_5fa7eb9d26f44.pdf
    • https://cdn-cms.f-static.net/uploads/4417675/normal_5fa560661cd6d.pdf
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f87c16a48fc0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b096d78c-0a2a-4958-9694-99b233ce1cc8/translate_english_to_spanish_mexicano.pdf
    • https://uploads.strikinglycdn.com/files/fbab29fb-ef1a-45db-a70a-96bf855f3d64/warkop_dki_reborn_full_movie_streaming.pdf
    • https://uploads.strikinglycdn.com/files/b4ac09e8-afa4-4ba1-b4e8-a95669189813/lirotudamerikirota.pdf
    • https://uploads.strikinglycdn.com/files/4c8ce7f1-0bb2-47a6-acc4-79e4f7579435/msi_afterburner_download_32_bit.pdf
    • https://uploads.strikinglycdn.com/files/1a6d6b54-a88b-499d-b984-94aecef2ee6d/biografia_de_aurora_reyes.pdf
    • https://s3.amazonaws.com/kepevipawit/16704269380.pdf
    • https://uploads.strikinglycdn.com/files/d8d7a74d-93d4-4aca-8de4-f474b8ffabf1/daria_is_it_fall_yet_dailymotion.pdf
    • https://uploads.strikinglycdn.com/files/2b641713-eb9c-4811-8b89-1da17dc67e35/79993328755.pdf
    • https://uploads.strikinglycdn.com/files/d8fc3372-4b71-413c-949b-90a75115ac13/81520963248.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c9.bin
6b6cca156ceea85c9d41563f9354601f498cacfcfcfe5707bede6e2af947b5a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 5032 bytes
font_01_sfnt_off000105da.bin
60c7954ad71e78216001a9315fb9d491890f2c64c928d11047bb3555befa253c
pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 9936 bytes