Malicious PDF — malware analysis report

Static analysis result for SHA-256 d758941d26bd6858…

MALICIOUS

PDF

66.4 KB Created: 2020-12-10 16:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 842f730a6c3e5541f6934584fe410b69 SHA-1: 1bd8f22a0abd8938f5db97c73d47ded3afe58205 SHA-256: d758941d26bd6858f491fdadff9b0e0405c6cfb7799973343d13c9c6cc054a13
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://traffmen.ru/aws?utm_term=catch+and+release+movie+parents+guide'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=catch+and+release+movie+parents+guide
    • https://cdn-cms.f-static.net/uploads/4485568/normal_5fb6e9f2a8af5.pdf
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5fab9b172014e.pdf
    • https://cdn-cms.f-static.net/uploads/4404313/normal_5f9b405e6857b.pdf
    • https://cdn-cms.f-static.net/uploads/4450438/normal_5fbde1dbd094d.pdf
    • https://cdn-cms.f-static.net/uploads/4469370/normal_5fc1dcbd464f6.pdf
    • https://cdn-cms.f-static.net/uploads/4389571/normal_5fa599bd933ac.pdf
    • https://cdn-cms.f-static.net/uploads/4374364/normal_5f88fdefa7977.pdf
    • https://static.s123-cdn-static.com/uploads/4447630/normal_5fd062ff61c1c.pdf
    • https://cdn-cms.f-static.net/uploads/4385427/normal_5fc35bfe1bf77.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0b64e6d49a06bb585cdf/1606290276866/the_plaza_movies_calgary.pdf
    • https://s3.amazonaws.com/nuvukivaxiren/insider_s_guide_to_nashville_tn.pdf
    • https://s3.amazonaws.com/fukezavazuj/australian_age_pension_claim_form.pdf
    • https://uploads.strikinglycdn.com/files/45ff3619-4c36-4f90-8c17-8357a51a88a6/davavi.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_off0000c80a.bin
ea088c2e9c75da08fbb8d3e70363c19951772cbd3bbc6afc00ed0413d43cf499
pdf-font-stream PDF embedded font (sfnt) at offset 0xC80A 5452 bytes
font_01_sfnt_off0000da6c.bin
a3bd0470d417ec1c3f9ea1705cf96a9e407ef747a68e527b2c6dd9d4b42f45f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6C 10104 bytes