Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe76e10d466bf26f…

MALICIOUS

PDF

64.9 KB Created: 2020-11-25 10:33:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 745499b02f5da24a05884119eebaf7ce SHA-1: 1d422876b94036a54ffde4230b631af32a1b5745 SHA-256: fe76e10d466bf26fd5cb1680111a2a9e94274a673a758620a9560bee98ffa3b2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are to benign-looking PDF files, suggesting a link farm or SEO poisoning tactic. One of the primary external links points to 'traffking.ru', which is suspicious. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/123?utm_term=canterbury+tales+prologue+test+multiple+choice+answers
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/5615478.pdf
    • https://nigokozop.weebly.com/uploads/1/3/4/4/134436215/337b5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nitatotol/81040225548.pdf
    • https://s3.amazonaws.com/kisagoz/blufftitler_13_full_crack.pdf
    • https://s3.amazonaws.com/wixanarer/xbox_360_backwards_compatibility.pdf
    • https://uploads.strikinglycdn.com/files/011107c8-162c-44ae-8ecd-8ae42d496b95/vosobidigodopifidapibawa.pdf
    • https://uploads.strikinglycdn.com/files/344e4112-06a7-488e-8af9-f79fa2b4c34f/89275536755.pdf
    • https://uploads.strikinglycdn.com/files/529a8784-5639-4641-8955-985afa06107f/34289263428.pdf
    • https://s3.amazonaws.com/nuxulikiwab/xurelejolafavulogibagiw.pdf
    • https://s3.amazonaws.com/magapeguwabe/sintesis_de_acetanilida.pdf
    • https://uploads.strikinglycdn.com/files/b249320e-5392-4736-9396-5f9fb41f58f2/big_java_late_objects_2013.pdf
    • https://s3.amazonaws.com/livivuvuwugeb/google_slides_templates_for_business.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_off0000c076.bin
1bcedbf6c86e56d3435a5b35a9e80e0b7550ed8d4465fae83fe095abaf509f96
pdf-font-stream PDF embedded font (sfnt) at offset 0xC076 5584 bytes
font_01_sfnt_off0000d361.bin
f6b23fa7c2fc14106877f42b0bd2353ff0eacd2c3cc6484cc908ae48aa8668a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD361 10404 bytes