Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ca9f5382d6062a…

MALICIOUS

PDF

66.1 KB Created: 2020-11-25 23:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1aea51b0bca0166d85f5ef4ba6d6e0d SHA-1: 18d6f21d89bd6103cc90466c3311a7476483134b SHA-256: 88ca9f5382d6062acd40c895fa70136c01b12ed2f3933d7de5e69d87d48cc456
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The primary URL, 'https://traffine.ru/strik?utm_term=john+deere+lt+130+manual', is likely a lure to direct users to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution 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://traffine.ru/strik?utm_term=john+deere+lt+130+manual
    • https://pikotefomulig.weebly.com/uploads/1/3/4/3/134317367/5e5df3d7fa25e.pdf
    • https://tenasedoba.weebly.com/uploads/1/3/4/3/134333827/9b6b6ea1.pdf
    • https://dotofinadi.weebly.com/uploads/1/3/0/7/130740455/b35e7c2de56a.pdf
    • https://cdn-cms.f-static.net/uploads/4410027/normal_5fa7c7cd4b8df.pdf
    • https://zunitilamurako.weebly.com/uploads/1/3/4/5/134529552/zibibelo.pdf
    • https://murikupa.weebly.com/uploads/1/3/4/4/134481598/wivatekazede.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lopadivupudexa/37996734331.pdf
    • https://s3.amazonaws.com/lixasifasi/12162103644.pdf
    • https://s3.amazonaws.com/mokamoba/kaxapad.pdf
    • https://uploads.strikinglycdn.com/files/f649a08d-2275-4711-b0fa-04c482a31cfb/adobe_premiere_pro_2017_crack.pdf
    • https://s3.amazonaws.com/wemazun/84027076245.pdf
    • https://uploads.strikinglycdn.com/files/7bda7c9b-6248-4dbd-aec7-959f43d04275/35948312367.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_off0000c623.bin
e4aafcd4796b2476cd2465c178783099ed30074a7ab2b926731b13f12f03041e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC623 5232 bytes
font_01_sfnt_off0000d7c5.bin
78f5d402a4d87bcd50950eb2bf3cafe32ef1dbaf7aa154510eca9ef6cebdba6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C5 10676 bytes

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