Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf27294dce45c553…

MALICIOUS

PDF

96.9 KB Created: 2020-11-10 10:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 03539bcd5e186cc985ad5f2a085ff540 SHA-1: 158323ceef26cbdc7c16b1659665158123ea2e55 SHA-256: cf27294dce45c553c89cc7d040518ca184e1b9b7e583958bde958b3f446cbf9f
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with one prominent URL suggesting a lure for 'showbox movies apk'. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/strik?keyword=showbox+movies+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f873f029e71b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_5f8b624e4740e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_5fa6eddbc8979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369495/normal_5f8f76d4dd61e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385030/normal_5f9ab40a16657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426087/normal_5f9f0106ac255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_5fa2998332965.pdfIn PDF document text
    • https://letolonenuxe.weebly.com/uploads/1/3/4/0/134095956/mejeduk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407793/normal_5fa77d6c9ed85.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wujapu/cyberpowerpc_gamer_supreme_liquid_cool_slc8280w.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/gegojojalafet.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/blue_springs_country_club_dress_code.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF8 5060 bytes
SHA-256: d9c2eda30393a99ee1b65e894708384f0804235a987ea709b32fe5a2ecd54f24
font_01_sfnt_off00013c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C34 13948 bytes
SHA-256: 05f7336ac052150c3d17b933ff1240a1cc8bd057b972f699a94a58196cc6c1a1
font_02_sfnt_off000168b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168B1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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