Malicious PDF — malware analysis report

Static analysis result for SHA-256 915d3464ad61bd77…

MALICIOUS

PDF

93.1 KB Created: 2021-03-11 10:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5e105c94686427d3ee65e722b38fc572 SHA-1: 5def3ca26f6340f9d85add84de15ba69fe78168c SHA-256: 915d3464ad61bd774addaf6fdf24193e617f5c690854e5953798e7dc38869c08
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://mezovuduw.ru/123?utm_term=2+fold+brochure+templates+microsoft+word PDF link annotation
    • https://cdn.sqhk.co/wegodimumod/dmghibI/america_funniest_home_videos_all_animal_extravaganza.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/zaTidSs/fizuda.pdfIn PDF document text
    • https://cdn.sqhk.co/segidexu/5hakgfp/85808448013.pdfIn PDF document text
    • http://cmb-societe.com/chopping_board_colour_chartlmre0.pdfIn PDF document text
    • http://servempieza.site/xadexazupusadeoivvn.pdfIn PDF document text
    • http://raisinshub.pro/bums_syllabus_2017o7rs5.pdfIn PDF document text
    • https://cdn.sqhk.co/zenegiwowi/icKYOgf/kinodoxusefaxesa.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/c47a2f47-ebc7-446f-9ffa-31b8079ee630/23024771241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c4b1e02-68af-4276-9fd3-a54361e85871/84965477167.pdfIn PDF document text
    • http://sedarukekinulos.rf.gd/guess_the_brand_logo_game_answers_level_4.pdfIn PDF document text
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_9d3eb26bd6db454d8e61543fe0a3ed86.pdf?index=trueIn PDF document text
    • http://tunufefenus.rf.gd/chamma_chamma_video_songs_2018.pdfIn PDF document text
    • http://vodugesivizere.epizy.com/nugamuvewejusovemozezinam.pdfIn PDF document text
    • https://60ceb029-6f78-4d42-8ea4-15ca08d8077a.filesusr.com/ugd/857e61_6abb76ce365143d6aca4229c0032a9fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7d416f4-e7cf-4478-8178-dd8fa5619f2c/fodikufavuxigikudadeg.pdfIn PDF document text
    • http://lilivuxaja.rf.gd/brochure_templates_free_for_word_2007.pdfIn PDF document text
    • http://vegawududabuz.rf.gd/bitcoin_miner_ios.pdfIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_ec0b67b06a96447cb279872121aa6088.pdf?index=trueIn PDF document text
    • http://neropalumej.rf.gd/how_to_setup_my_harmony_350_remote.pdfIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_33577a63e1c14642b3bd386c26f4ce97.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA2 5664 bytes
SHA-256: 5245c8b0b62307ec2cd6ed9a2834eb369c6c1003bb99f01a4f540d293842c6a7
font_01_sfnt_off00013fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC7 11368 bytes
SHA-256: 726055e7804136988b011e2be6a25f7f2eeb059b438890bbc73b27e101865ae0

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