Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3080fd09c6d942a…

MALICIOUS

PDF

87.0 KB Created: 2021-03-04 18:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1e190766c9ddeab942bb9bfb5e937f81 SHA-1: ec79a29b8c9d1a222caa61081665679d87701055 SHA-256: e3080fd09c6d942abe75837029ebbcb2f4368f7ae02c4e44a417fb6c037b978a
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous external URLs, suggesting it functions as a link farm or phishing lure, directing users to potentially malicious sites. The document body, though heavily obfuscated, appears to be a deceptive lure related to search queries.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://resalured.ru/strik?utm_term=what+is+an+infrared+patio+heater PDF link annotation
    • https://cdn.sqhk.co/waxubisolo/bjbUgjy/bosu_ball_balance_trainer.pdfIn PDF document text
    • http://kudretbozaci.com/rinokunepopopusuj8ers.pdfIn PDF document text
    • https://cdn.sqhk.co/ladesajisama/hbb0Ahc/extreme_digital_cinema_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378845/normal_6005a1727335a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5fd779db268aa.pdfIn PDF document text
    • https://cdn.sqhk.co/ganidabizi/hgcjagi/pokimane_age_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/xenekifa/6ifdgcR/mr_kipling_toffee_apple_slices.pdfIn PDF document text
    • http://urott-hu.com/10824123477bhb8l.pdfIn PDF document text
    • http://center-about.com/kakilininosar6da8.pdfIn PDF document text
    • http://nesobaka9.xyz/bullet_smoothie_maker_amazont52n6.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/geibhcr/dictionary_apple_definition.pdfIn PDF document text
    • http://becloud.website/206688535910r7eh.pdfIn PDF document text
    • http://gnatural.space/super_betting_tips_vip_apks3mkk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_602e30cf06c5f.pdfIn PDF document text
    • http://xruhdfo.site/xalatittexb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5fcceff592b3f.pdfIn PDF document text
    • http://gutprod.xyz/82588200329ssbsr.pdfIn PDF document text
    • http://xigirirata.22web.org/50592459624.pdfIn PDF document text
    • http://cyberghost.store/303758911851if8d.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/Bx6Rigf/puzoladenesofavimoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fumaresaxebikab.epizy.com/sivelonaxuri.pdfIn PDF document text
    • http://maweriza.epizy.com/thailand_visa_on_arrival_application_form.pdfIn PDF document text
    • http://vawelinixafapi.epizy.com/funewefovubutafizet.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_off0001177e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177E 5108 bytes
SHA-256: bc60a4dd3093d667f47f65849cc4392bf867430bf2ee7202dfb77a3c444e60c0
font_01_sfnt_off000128e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E8 11060 bytes
SHA-256: 54debb9a5996735b4d092e8ffae84a084bf0240e202afbc78139bb733a0dca2f

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