Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a3979fd52f0b374…

MALICIOUS

PDF

67.7 KB Created: 2020-12-14 16:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e63af6eb34ebc3a8963c3f71c942504 SHA-1: 1c4ff45284c532102fbfb0bf5585e287817c8072 SHA-256: 4a3979fd52f0b3741a1cfc1069edb4f112f4efa95f40b7d1d15eb4bbccde2f7b
194 Risk Score

Malware Insights

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

The PDF contains a link to `traffmen.ru`, identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure for an educational PDF, suggesting a phishing or social engineering attempt. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing trojan designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/123?utm_term=los+cuatro+pilares+de+la+educacion+jacques+delors+pdf
    • https://static.s123-cdn-static.com/uploads/4450036/normal_5fc80053bf670.pdf
    • https://cdn-cms.f-static.net/uploads/4462035/normal_5fa3037d849a0.pdf
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f94dd581648d.pdf
    • https://damokilusul.weebly.com/uploads/1/3/4/4/134463963/kijurususebulusatata.pdf
    • https://static.s123-cdn-static.com/uploads/4389106/normal_5fcefdca2b770.pdf
    • https://static.s123-cdn-static.com/uploads/4425916/normal_5fcbf00a16641.pdf
    • https://static.s123-cdn-static.com/uploads/4382405/normal_5fcd6c8fc64d7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tuzamada/wimijaxiwakibumoduk.pdf
    • https://s3.amazonaws.com/luxelula/that_would_be_great_meme.pdf
    • https://s3.amazonaws.com/lulelepese/a_frame_house_plans_free.pdf
    • https://static1.squarespace.com/static/5fc0c87788c99b6d37a67a80/t/5fc1a52b3485235c8604bf9b/1606526253030/obox-ob_5e_stats.pdf
    • https://s3.amazonaws.com/jidosatikim/22703589108.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_off0000c9ec.bin
b2e81143775b205bd5e4d3167536d023666173820602a454018136d5d04dadb9
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EC 5292 bytes
font_01_sfnt_off0000dc00.bin
c879bb4b7dc4e6d87c38b9df0ed6ec9b14bb6db2cfe58a869d7f2506940939d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC00 11076 bytes