Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7fcf9dfafda72f8…

MALICIOUS

PDF

72.0 KB Created: 2020-11-10 19:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77b7a2411dbb979ca70156a5064ae119 SHA-1: 77b8611dd2b90f3d4ad96b809a100309ef8aa551 SHA-256: b7fcf9dfafda72f8ab9a204d0327012e32d941083b12efd2a3b82aa41e965966
96 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URLs, such as 'https://traffine.ru/strik?keyword=simcity+4+mods+for+steam', suggest a phishing or social engineering lure, likely aiming to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to deliver malicious content.

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://traffine.ru/strik?keyword=simcity+4+mods+for+steam
    • https://muvitaburire.weebly.com/uploads/1/3/4/4/134441723/50680179857f.pdf
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f873207ab1ab.pdf
    • https://ratomewupevo.weebly.com/uploads/1/3/4/2/134234569/bidedezukujunu.pdf
    • https://cdn-cms.f-static.net/uploads/4393220/normal_5fa28990ab273.pdf
    • https://cdn-cms.f-static.net/uploads/4388063/normal_5fa0df67a767c.pdf
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/1893061.pdf
    • https://puwexisafiza.weebly.com/uploads/1/3/4/5/134586360/9662553.pdf
    • https://cdn-cms.f-static.net/uploads/4408997/normal_5fa4f84f8f370.pdf
    • https://raxabebawozovi.weebly.com/uploads/1/3/4/3/134311701/nanusefikejob-rozukewiv.pdf
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5f9879161f18a.pdf
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5f8891a584832.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/12cca0ec-acc2-447f-bcc1-4c678a39d4b7/english_grammar_in_use.pdf.pdf
    • https://s3.amazonaws.com/bofake/varopetijawi.pdf
    • https://s3.amazonaws.com/ruzumeb/animals_that_start_with_bu.pdf
    • https://uploads.strikinglycdn.com/files/2bc67559-76f5-48bd-bc9c-f5ded089b8a0/nibulukewafixaruzi.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_off0000dc0b.bin
10324c606267187c9f192ca3243e23762d8d3d13cea576be1941e3ffa502638e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0B 5428 bytes
font_01_sfnt_off0000ee7c.bin
98590779ac1f81efc7d4c652509a62c266ec7a378e2ec20ba27e11ec7b13ddbc
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7C 10712 bytes