Malicious PDF — malware analysis report

Static analysis result for SHA-256 a82666df544aee1d…

MALICIOUS

PDF

71.3 KB Created: 2021-03-17 10:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d47a38c38c65cdf798bc141566e1424a SHA-1: caf5ffc2b89a46fd06ff196288a3163e5ee7f16c SHA-256: a82666df544aee1d1f28d70afc497cc80cdf504640c877ec48bbd0ff49bf2efe
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary one pointing to a suspicious domain associated with phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/award?keyword=joy+to+the+world+unspeakable+joy+chords+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404122/normal_604b7262ab288.pdfIn PDF document text
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/ca499.pdfIn PDF document text
    • https://mufosuxid.weebly.com/uploads/1/3/4/0/134040625/5783439.pdfIn PDF document text
    • https://tezadogiva.weebly.com/uploads/1/3/4/5/134522012/wowokogexin_rutarija.pdfIn PDF document text
    • http://tamakar.tech/what_is_a_construction_quality_assurance_plan6mj73.pdfIn PDF document text
    • http://ericksandoval.com/los_angeles_azules_17_aos3qny5.pdfIn PDF document text
    • http://tameenegypt.com/siripuwukutajegugalilewv4cxx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417309/normal_5fc673ad92412.pdfIn PDF document text
    • http://kayikciakademi.com/wumivijabegatiwijesuw4ke1u.pdfIn PDF document text
    • https://bojuwakuxejekur.weebly.com/uploads/1/3/5/3/135347713/mefuvuzot.pdfIn PDF document text
    • https://xakolino.weebly.com/uploads/1/3/1/4/131453712/4438669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452608/normal_60122197a6723.pdfIn PDF document text
    • https://lekusilikeveb.weebly.com/uploads/1/3/0/7/130739001/biwewejonujo-fuvimabozavoziz-posurobeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377113/normal_5fe0032a98182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369764/normal_6000f0674dd7b.pdfIn PDF document text
    • https://todumubisopid.weebly.com/uploads/1/3/5/3/135312552/e235d6df9afe56.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/dell_venue_8_pro_5855_lte_specs.pdfIn PDF document text
    • http://cmbespaceclient.xyz/flowers_in_the_attic_movie_2014_castzt714.pdfIn PDF document text
    • http://toworugesolur.getenjoyment.net/venuzosopunopiruwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/572e2e16-91c6-4e66-b178-c56c871be5ca/kenmore_elite_washer_troubleshooting_codes.pdfIn PDF document text
    • http://luxupuxud.myartsonline.com/20984230714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89946de7-5b47-4ef6-981c-a1d8aae82608/line_6_spider_3_75_watt_no_sound.pdfIn PDF document text
    • http://bigapenegig.atwebpages.com/zimisidodefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5286f5-4aaa-4bce-89a3-c283fa226446/guzuwegosemibulusat.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_off0000d850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD850 5708 bytes
SHA-256: 9858ef52308a44ffdf042466cb745bef86b7ae590cd92d8226b820e8ef41aeb1
font_01_sfnt_off0000ebc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC8 10172 bytes
SHA-256: 45af4509b8885ba0184473636a679d65d75f714f45966a63b8cd6509e6520c28

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