Malicious PDF — malware analysis report

Static analysis result for SHA-256 e916c943114fdb12…

MALICIOUS

PDF

70.4 KB Created: 2020-11-23 20:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bb3ac0f08e406004586fdaa69893a31 SHA-1: 553d616448844275fb4c5c2a40ead51909609cd0 SHA-256: e916c943114fdb12c0c5b349f7ca23ac0f6156a9f5999a445ad0afe7a0740178
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though heavily obfuscated, contains text related to a 'super system video' and the authoring application suggests it was generated programmatically. The presence of multiple Weebly-hosted PDF files suggests a campaign distributing malicious content. No scripts were extracted, but the PDF structure and link farm heuristic strongly indicate a phishing or scam attempt.

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://traffking.ru/strik?utm_term=get+your+ex+back+super+system+video
    • https://xumodaniteged.weebly.com/uploads/1/3/4/4/134480563/juxadipexof_tutexif_ranusozabefaz.pdf
    • https://ludasajuwo.weebly.com/uploads/1/3/4/0/134096591/woxagom.pdf
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/eba620829822202.pdf
    • https://cdn-cms.f-static.net/uploads/4374708/normal_5f9a33b40a89b.pdf
    • https://vidafaloduwi.weebly.com/uploads/1/3/4/7/134716621/rozaxarujutokibaf.pdf
    • https://jafexilodivoso.weebly.com/uploads/1/3/4/4/134499272/3446083.pdf
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/7702792.pdf
    • https://dafanifupo.weebly.com/uploads/1/3/4/6/134645493/ramabu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mavixu/botutipibufateva.pdf
    • https://s3.amazonaws.com/susopuzupure/lte_capacity_planning.pdf
    • https://s3.amazonaws.com/minegikukovel/zelokotaxulijune.pdf
    • https://s3.amazonaws.com/potamotaz/online_english_grammar_quiz_reported_speech.pdf
    • https://s3.amazonaws.com/bivanud/bigg_boss_season_3_telugu_episodes.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_off0000da82.bin
bc32a72bd45e8fd1a0e141d3ff546db504b5678d0886cc51202d6250e4359a24
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA82 5652 bytes
font_01_sfnt_off0000edb5.bin
3bed6a0a8b3c41843ec923c642422cd8fcd4c6b029396c60dccab08300b840d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB5 9160 bytes