Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd3d3d5954b23d9…

MALICIOUS

PDF

123.0 KB Created: 2021-05-27 06:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c09c71d3c8b02d2e293bf487e50ad497 SHA-1: 4552910c2f1af82fe6a140d336dddbbef34fca77 SHA-256: 0fd3d3d5954b23d9c35bb532c8bc3863c5836ce5243958349e4b21d2f9fa99fc
186 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 pointing to disposable hosting services, and one primary URL that is likely malicious. The heuristic firings indicate this is a link farm designed to redirect users, and ClamAV detection confirms it as a phishing trojan. The embedded content, though obfuscated, suggests a lure related to 'marvel films on disney plus'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/strik?utm_term=list+of+marvel+films+on+disney+plus PDF link annotation
    • https://kokesekodabese.weebly.com/uploads/1/3/4/0/134012443/8011439.pdfIn PDF document text
    • https://jumopafebog.weebly.com/uploads/1/3/4/5/134504074/7910061.pdfIn PDF document text
    • https://vapatukubarokul.weebly.com/uploads/1/3/0/7/130739856/megakusazuwon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445331/normal_5fe564fb6c45d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494452/normal_600a1cad4f730.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476011/normal_6004cafb8b5a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478125/normal_5fcd608ca589c.pdfIn PDF document text
    • https://sobuxiba.weebly.com/uploads/1/3/4/8/134867950/bedodadoriloriki.pdfIn PDF document text
    • https://betiriwusogaz.weebly.com/uploads/1/3/1/3/131380032/8381474.pdfIn PDF document text
    • https://kivifakan.weebly.com/uploads/1/3/4/8/134870172/3898075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421630/normal_60688036ddc4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485926/normal_604e27f56907e.pdfIn PDF document text
    • https://rozinezo.weebly.com/uploads/1/3/1/6/131636990/kaxewuwagadi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464735/normal_60536bcc2320f.pdfIn PDF document text
    • https://laxonetamaj.weebly.com/uploads/1/3/4/0/134096763/zogikalefe-tesiti-wewifog-zononaxavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_6016076693ca6.pdfIn PDF document text
    • https://mokomopepu.weebly.com/uploads/1/3/5/3/135333670/8445278.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://uploads.strikinglycdn.com/files/47d18349-48a5-47f1-8736-a64ff2d57ddb/60514261060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd99a5d8-d8c7-47a6-b5ec-20c5863742ca/difitaraweg.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_off000193f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193F5 5172 bytes
SHA-256: a6c70f0fb98eb489fa4bc0b38b474f08a0c8f6a3459afff611b82d2e4b4a1cbb
font_01_sfnt_off0001a576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A576 12232 bytes
SHA-256: 4d1d56e877c66a721672792f98444a82993db0d9b31cb9b7daf072397430eae8
font_02_sfnt_off0001ce83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE83 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361