Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf675209538fdd4…

MALICIOUS

PDF

91.1 KB Created: 2021-05-19 02:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c1705fbd6709ab3c2713fe1deb1370f7 SHA-1: b4c19fa94a84511b3f38a55fea6f4f481c889a6d SHA-256: 9cf675209538fdd4114edd34b61835f4939cfd95e20ae6b07672983446426d0e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains multiple embedded URLs, with a primary focus on directing users to 'https://seumenha.ru/strik?utm_term=wwe+2k17+preset+entrances', likely to download a secondary payload or redirect to a phishing page. The document body, though heavily obfuscated, contains text related to the lure. No scripts were extracted, but the presence of external URIs and the ML/ClamAV detections strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=wwe+2k17+preset+entrances PDF link annotation
    • http://rasixojolebasug.iblogger.org/fojadizonezakasowapojik.pdfIn PDF document text
    • https://wukavogitebiw.weebly.com/uploads/1/3/5/9/135964288/metalofaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410953/normal_601c5d926e324.pdfIn PDF document text
    • http://wenaparufikunon.22web.org/bizevet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500208/normal_60289c6223255.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421764/normal_5ff7131aa636b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5fd644cd5837e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410989/normal_606dd640243cc.pdfIn PDF document text
    • https://gizituxozofu.weebly.com/uploads/1/3/5/3/135303534/9941089.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
    • http://xabuvijuj.rf.gd/movies_2019_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/loreliduluxabufopopok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f6f01ab-ece5-404a-86e2-f1df343377ff/ms_drivers_license_renewal_fee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8968d2e6-46f9-42b0-8a6a-12920d5d94ba/conversor_gramos_a_mg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1ea4bac-d093-4d5d-ad01-3b8be68b1d5d/vukuxevegofogupudisojelem.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/herfy_food_services_annual_report.pdfIn PDF document text
    • http://duposavolat.rf.gd/anonytun_apk_pro.pdfIn PDF document text
    • http://vefogisoj.epizy.com/lomebedej.pdfIn PDF document text
    • http://jijabivu.epizy.com/34935613616.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/music_appreciation_class_college.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB8 4960 bytes
SHA-256: 8429bed0d4abfab78b1146c08b34df4d34e14c946fbe5f4b8d4e3708120feb17
font_01_sfnt_off00012dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBB 10424 bytes
SHA-256: 22f9b74880107a20063dc15d0cde5df7ff1b797b641c5413bf1a7d97ad302b41
font_02_sfnt_off00015130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15130 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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