Malicious PDF — malware analysis report

Static analysis result for SHA-256 76795a47f747d652…

MALICIOUS

PDF

68.4 KB Created: 2021-02-10 02:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 61adaf3bee8893163e5753c2b6504094 SHA-1: 7be8edbfdf16584019a7653e077d1b1a45136856 SHA-256: 76795a47f747d652695184bc1857acab91e4a468da90b1b074004ed67cf7338f
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. The document body, though heavily obfuscated, appears to be a lure related to a movie search query, directing users to external URLs. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to potentially malicious content.

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://seumenha.ru/wb?keyword=falling%20inn%20love%20imdb%20parents%20guide PDF link annotation
    • http://wirelosine.22web.org/18141793558.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476140/normal_5feb2077d2f52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490122/normal_601f2bb23f144.pdfIn PDF document text
    • https://cdn.sqhk.co/panafilaputu/eIIJygw/tupovawuzuso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393644/normal_6012958f087b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393353/normal_601334c7a2d0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449775/normal_5fed198025169.pdfIn PDF document text
    • https://cdn.sqhk.co/noxawuge/kxhcnC3/real_racing_3_mod_apk_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403418/normal_600c03913bd71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451760/normal_601d8311f1652.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/ladojenefe/ganup.pdfIn PDF document text
    • http://segoxegigo.epizy.com/47015812474.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/78402167323.pdfIn PDF document text
    • http://tesalivolanimeg.rf.gd/mole_conversions_practice_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/dezomugodizavijesagos.pdfIn PDF document text
    • http://duzavito.epizy.com/high_wizard_farming_guide_ragnarok_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/zijuj.pdfIn PDF document text
    • http://tunazafagid.epizy.com/56326234617.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_off0000cb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB73 5436 bytes
SHA-256: 2b4d38c318e04a1e401cb9336bc5a58a18843cc69aff65c3913163a68ac92912
font_01_sfnt_off0000ddd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD5 11448 bytes
SHA-256: 276f29dabbbf2d2153c51c59a6d7cee11752f5c1c9e67e74d029858bbff352fa

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