Malicious PDF — malware analysis report

Static analysis result for SHA-256 e116d4ca037c1a26…

MALICIOUS

PDF

72.5 KB Created: 2021-01-17 15:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 754c7746ac381ec4edc9c647042f9f9d SHA-1: 931a6a989c2dea27b4ce9c179e8205643e61f945 SHA-256: e116d4ca037c1a2612fe4d3506a47aabd02dc2a0637048518463b67c87ac82ac
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafftec.ru', which is likely used to redirect the user to a phishing or malware-hosting site. The document body, though heavily obfuscated, suggests a lure related to 'Whatsapp messenger for my pc'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafftec.ru/aws?utm_term=whatsapp+messenger+for+my+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424013/normal_5fba23bb43173.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468843/normal_5ff8623c80fae.pdfIn PDF document text
    • https://cdn.sqhk.co/joduragenep/Vgihghi/global_warming_definition_national_geographic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f874875a3b01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419452/normal_5fac0c5b90ae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417535/normal_5fd64a20a2a2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5f8f186b23d5b.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/jcjDiaD/school_of_dragons_codes_september_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f89e92f250eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_5fdebd148e23f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/aditivos_quimicos_e_suas_funes.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/free_lesson_plan_templates_for_teachers.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_off0000dd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5B 5512 bytes
SHA-256: 009a09707c8f200c3f69c3340cf82d7c8bc137041b525160a603c38ef09a3ae6
font_01_sfnt_off0000f007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF007 11140 bytes
SHA-256: 641c412cd4657962576bcc6676247eab9242b9a2cc83cc7115f5463619a5ab02