Malicious PDF — malware analysis report

Static analysis result for SHA-256 516c37b8170e1feb…

MALICIOUS

PDF

75.2 KB Created: 2020-11-21 00:30:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa10949687049afe5c6aac9a2b78529b SHA-1: 28daf538d40768315b5f2584ac27f4964bbce0cc SHA-256: 516c37b8170e1feb952ad502220910b17d74cd13bdd6634d5157acda24456385
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains an embedded URI pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily garbled, contains text related to car batteries, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=who+sells+autocraft+batteries+for+cars
    • https://cdn-cms.f-static.net/uploads/4451742/normal_5fa065d360edd.pdf
    • https://cdn-cms.f-static.net/uploads/4451760/normal_5fa666040bcdf.pdf
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5f891cb6375a0.pdf
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f981bdcad118.pdf
    • https://cdn-cms.f-static.net/uploads/4387421/normal_5f9158bfd5bf9.pdf
    • https://cdn-cms.f-static.net/uploads/4382784/normal_5f91f66a87618.pdf
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f8a40a6b1c49.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/ca534a29-f2d4-4c67-8e16-d3ca207ff48f/tifaxowanomutubopo.pdf
    • https://uploads.strikinglycdn.com/files/5c2e1e06-78a4-44ea-a561-c7ad55e22112/detunanesufadubomisugimo.pdf
    • https://uploads.strikinglycdn.com/files/92e8c878-5332-4b1e-8528-e7affdecdafb/duwevipotivek.pdf
    • https://s3.amazonaws.com/ganubifirigevi/19897234012.pdf
    • https://uploads.strikinglycdn.com/files/f8f290ef-d8ba-46f6-826a-3fc91c1bf47e/3013680583.pdf
    • https://uploads.strikinglycdn.com/files/a23dddcc-497e-490d-b82b-01278b17ffd6/century_battery_charger_parts_list.pdf
    • https://s3.amazonaws.com/fuwawibu/62387169365.pdf
    • https://s3.amazonaws.com/febopa/weather_channel_mansfield_ohio_hourly.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dce6.bin
60058ec63d40234a8970e9851588508c7d4d3bf2d3473f4e8259185e5a779844
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE6 4900 bytes
font_01_sfnt_off0000edb1.bin
5c809e0947e9dec4b9e40951a9c554540989e6cc9d0895517c6ef3db7503c0a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 10436 bytes
font_02_sfnt_off00011172.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x11172 4324 bytes