Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7976f8fefffca8…

MALICIOUS

PDF

72.1 KB Created: 2021-02-28 16:53:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c4d6384f75cfe78e7bcbc7e2339f3c04 SHA-1: 38e2b0d0ddead2700c11549998a7679bd312720d SHA-256: 7f7976f8fefffca8439a19255b5e50b57c6360d688f4a1176fdcef20792cf3ed
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, appears to be a lure related to recipes, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/wb?keyword=electric%20pressure%20cooker%20recipes%20scalloped%20potatoes%20and%20ham PDF link annotation
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/dilipifir.pdfIn PDF document text
    • https://cdn.sqhk.co/sezepemanu/jcP8pgj/65747938411.pdfIn PDF document text
    • https://todatukutazatu.weebly.com/uploads/1/3/5/3/135309816/17de2cd6.pdfIn PDF document text
    • https://cdn.sqhk.co/bokapapukopa/qEggjje/dogeserusamozugow.pdfIn PDF document text
    • https://gozexorajive.weebly.com/uploads/1/3/4/6/134610068/xogixika.pdfIn PDF document text
    • https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/tawarewawululiw-fogojoketuxu-daluzomugigep.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/how_do_i_manually_drain_my_lg_front_load_washer.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/jgJJNRF/bally_s_king_resort_room.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/paron.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/faa-h-8083-30_en_espaol.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/do_you_capitalize_graduate_student.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/idwaZgj/riptide_gp2_mod_apk_android.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/gghet8a/25069809737.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/babuxufarizuxur/nutox.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/91498139196.pdfIn PDF document text
    • http://revudipepofaten.myartsonline.com/craftsman_air_compressor_20_gallon_1.5hp.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/5138171150.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/bishop_s_hatfield_uniform.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_off0000dcc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC4 5336 bytes
SHA-256: 41e2dcdf75ca019390c5a56a997993c2d11883e067ade69eba0eaf8d3645ce5a
font_01_sfnt_off0000eebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBF 10580 bytes
SHA-256: 1549fc7c56c278b02e16984615e7522fae1784a71111bb447dde7edf9bdeb014

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