Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e10a765e675a27…

MALICIOUS

PDF

78.8 KB Created: 2021-02-21 04:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 000993502b6cf5445af036ee060bd880 SHA-1: da5685d64ba32810b28bde7c9d7b4e97d13d2d1c SHA-256: 62e10a765e675a27f4ede235b4c13d4f8b0a251d5d01ec3af8c3b6d9d96ae213
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/123?utm_term=is+a+court+of+wings+and+ruin+the+last+book PDF link annotation
    • https://jiwozipepogi.weebly.com/uploads/1/3/4/4/134462700/fisafotutimag_neliwapewapag_zazaxikivusaxep_xudud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455198/normal_602a58becf849.pdfIn PDF document text
    • http://community-day.ru/88509416189caxfb.pdfIn PDF document text
    • http://reduslimer.website/lobebusuw4bvyk.pdfIn PDF document text
    • http://zikuwojanubeg.iblogger.org/xodiwiwexuvov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_6029ee7b1970e.pdfIn PDF document text
    • https://vijosiza.weebly.com/uploads/1/3/4/7/134746498/jagip-minajoleseli.pdfIn PDF document text
    • http://latuha.com/rowev30tzs.pdfIn PDF document text
    • https://vakilelem.weebly.com/uploads/1/3/1/3/131379598/kifugalaxuzakuraped.pdfIn PDF document text
    • https://vimexizud.weebly.com/uploads/1/3/4/7/134755563/3809105.pdfIn PDF document text
    • http://raifaisentgo.online/2004_ford_focus_battery_wiring_diagrampdcld.pdfIn PDF document text
    • https://lumovomudin.weebly.com/uploads/1/3/4/7/134704265/pibuxagaluguv.pdfIn PDF document text
    • https://bibikabefome.weebly.com/uploads/1/3/5/3/135392895/d687f11e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470540/normal_5fda3abea3bb4.pdfIn PDF document text
    • https://puwowuxavuz.weebly.com/uploads/1/3/2/6/132682233/8545746.pdfIn PDF document text
    • http://itchia.space/60697756587a1im4.pdfIn PDF document text
    • https://guxitokos.weebly.com/uploads/1/3/2/6/132681611/6bfe274447061.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pilomewolax.epizy.com/44061475432.pdfIn PDF document text
    • http://vadibezodaxilez.rf.gd/noxikakutopi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57F 5516 bytes
SHA-256: 8154fa492e6d803cb44eb55c7c33e196db5541533a264e33c9b68101b854737f
font_01_sfnt_off0001084c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084C 11212 bytes
SHA-256: c0e81eadd0a7ac884c75b0e3457df25010a1d4495afa8a985c01c56c0bcfcefd

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