Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8cf9e8714cd1215…

MALICIOUS

PDF

74.7 KB Created: 2021-03-02 01:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a330399f125d1819eb7a13322ab8d815 SHA-1: a99c9bbdd0bebf45502ff51d00d55d68c753b126 SHA-256: c8cf9e8714cd121572b035c6f1e9a8bf6187c8a78d749da5ae0774799b9c4c18
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to movie streaming, which is likely a lure to entice users to click on the malicious links.

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://druttle.ru/strik?utm_term=harry+potter+part+1+full+movie+in+hindi+watch+online+youtube PDF link annotation
    • https://cdn.sqhk.co/jefulajidi/gicH7Sy/pk_xd_mod_dinheiro_infinito_apk.pdfIn PDF document text
    • http://natnat.fun/mutogiwatx1ie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498678/normal_5ffa381900e51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468827/normal_603634346ea8f.pdfIn PDF document text
    • http://nyvelsets.online/65971333054r28xk.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/the_aether_life_as_a_god_mod_unlockedverl3.pdfIn PDF document text
    • https://cdn.sqhk.co/kavatupopum/RCXhehf/standoff_2_mod_apk_unlimited_money_2020.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/67570409817.pdfIn PDF document text
    • http://openplafond.xyz/michelin_star_restaurants_guide_bookxl1ur.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/simplicity_riding_mowers_for_sale_in_ohio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384295/normal_603587dda8fcb.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/geijvid/dodadukimelukeda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/fireeye_nx_2500_datasheet.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/berabozuluduzalobitup.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/xabijololede.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/fios_home_router_g3100_review.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_off0000e610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE610 5624 bytes
SHA-256: 2d2e8a782e36757f81777f956ee587373445f152a5d75d9903778ffea6caa9c6
font_01_sfnt_off0000f92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92A 10600 bytes
SHA-256: a445c8df9d5ed9ef02f1e9d40ff998d278107f910b2aa4ee24b5efb516ded933

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