Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f2be205e81ec48…

MALICIOUS

PDF

80.0 KB Created: 2021-04-06 09:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 851902edbe215076aa67bfa4db2fcbd4 SHA-1: 78965acdc72f5aedbfef7ba941a7eac9dcaa1a0b SHA-256: 08f2be205e81ec4850efde6cc80820ced810078bc632060753ca8e6f699fb44a
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains, indicating a phishing or spamming campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://nipisod.ru/strik?utm_term=how+to+use+samsung+smart+tv+remote+apple+tv
    • https://static.s123-cdn-static.com/uploads/4426813/normal_5fee8f5ee8839.pdf
    • http://study-english-04.space/15534327387kr729.pdf
    • http://davebamonuzove.medianewsonline.com/h2o_mop_x5_elite_how_to_use.pdf
    • http://tosefabebiribow.scienceontheweb.net/51020565493.pdf
    • http://fofajofafe.iblogger.org/baccalaurat_en_mathmatiques_et_informatique_ulaval.pdf
    • http://masalev.ru/bhai_ravinder_singh_ji_albumsa84ix.pdf
    • http://poroda.site/polizarosokozowob5hio5.pdf
    • http://mubilinagak.22web.org/4166285167.pdf
    • http://generalmassage.online/newugiluxekazikaxt013u.pdf
    • http://vodabutopidaru.getenjoyment.net/best_indian_romantic_novels_2020.pdf
    • https://static.s123-cdn-static.com/uploads/4417998/normal_5ffd2ba69ac0a.pdf
    • http://rotelebi.22web.org/xewunosuzavegiga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/ec0f30d0-a5d4-4ff5-9982-a8abe6f988d3/rerutofufak.pdf
    • https://s3.amazonaws.com/kovezodepugov/53793369806.pdf
    • https://uploads.strikinglycdn.com/files/1e587b66-3425-453b-9493-a9dd89083e24/83632260492.pdf
    • https://uploads.strikinglycdn.com/files/c9b188fa-0fa4-4973-9f5a-7bcdb0c92ba4/star_wars_in_chronological_order_including_shows.pdf
    • https://s3.amazonaws.com/bomupi/vusagafufeve.pdf
    • https://s3.amazonaws.com/tumasun/best_ppt_templates_free.pdf
    • https://s3.amazonaws.com/wowonesoribu/kojumepake.pdf
    • http://rinejifivazori.epizy.com/6457237330.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed1.bin
f3121dbb16475f18c8c9a44e47c4837e48bac5db2fbc898a42f78d5a53d48bd0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEED1 5084 bytes
font_01_sfnt_off0001001a.bin
7b4499ac681e8e96fbf886b6b7f09bb3d5d41d4ea6820a767cd940137683ca21
pdf-font-stream PDF embedded font (sfnt) at offset 0x1001A 10656 bytes
font_02_sfnt_off00012491.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12491 4324 bytes