Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb9c98692f1fd3e…

MALICIOUS

PDF

66.6 KB Created: 2020-11-26 02:01:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01fafeb07ada10ba2b8997196272bb08 SHA-1: 193fd600f08d5f949a5b82f83291d7c853d69b68 SHA-256: 7cb9c98692f1fd3e7c99314bdc10d62863e0f51a133ba11d5e3677f45b022426
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary external URI, 'https://traffnew.ru/strik?utm_term=python+car+alarm+remote+programming', suggests a lure related to car alarms or programming, potentially leading to a phishing or malware download site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/strik?utm_term=python+car+alarm+remote+programming
    • https://cdn-cms.f-static.net/uploads/4496826/normal_5fada90542787.pdf
    • https://xekexudaxojow.weebly.com/uploads/1/3/4/3/134365032/867368.pdf
    • https://cdn-cms.f-static.net/uploads/4387931/normal_5f8d55e279b21.pdf
    • https://gofadoden.weebly.com/uploads/1/3/4/6/134615513/9093585.pdf
    • https://cdn-cms.f-static.net/uploads/4450519/normal_5fa288ce48c3f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2cdbc161-6ff9-45cc-9883-bfa9dec8aac6/71302643206.pdf
    • https://s3.amazonaws.com/zeworibuzoza/nvidia_geforce_experience_black_screen.pdf
    • https://s3.amazonaws.com/neviwove/question_of_policy_examples.pdf
    • https://uploads.strikinglycdn.com/files/05972521-7088-43fe-95d1-5cb75e62bbca/33376888531.pdf
    • https://uploads.strikinglycdn.com/files/dccd18c2-6cee-43c4-a0cf-9aa151429d1c/36401966483.pdf
    • https://uploads.strikinglycdn.com/files/58640b4d-67f0-4cc3-a287-4da7b5c3222f/fadoxiboditiwozekupevub.pdf
    • https://s3.amazonaws.com/gotijejaj/loviluf.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_off0000bdb7.bin
f73d625dc59294213bbaf215620328164be25fb0e5a3f8f281e56fa131ee1ce3
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB7 5060 bytes
font_01_sfnt_off0000ceb2.bin
7ea730555308c85421a5b02f4b3cd45ca2f4e44fe578ef419d773c7667461ead
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB2 9824 bytes
font_02_sfnt_off0000efc1.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC1 4324 bytes