Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0cc911b0110928…

MALICIOUS

PDF

113.3 KB Created: 2021-04-24 14:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8667713b7644d8c49da05c8c77f71d9d SHA-1: a84ed053d14e28d68ac5cd9ae6b915585c07d2fd SHA-256: 8f0cc911b0110928afbbd2de61f2b3f8803de1e5d8cc8c82f5e76b1d3b52d79a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a mass external PDF link farm, with many links pointing to disposable hosting, suggesting a tactic to distribute malicious content or phish for information. The embedded URL 'https://mezovuduw.ru/strik?utm_term=minecraft+bookshelf+texture' and the link farm starting with 'http://xijonofupawulo.mypressonline.com/80781027734.pdf' are key indicators of this malicious activity.

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://mezovuduw.ru/strik?utm_term=minecraft+bookshelf+texture PDF link annotation
    • http://xijonofupawulo.mypressonline.com/80781027734.pdfIn PDF document text
    • http://naxajogilelog.medianewsonline.com/what_are_the_6_steps_of_conflict_resolution.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/59125694-d6f7-4a47-b409-aa1de2d67278/bowflex_pr3000_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/wasamuvatalede.pdfIn PDF document text
    • http://jeximojela.myartsonline.com/whirlpool_washer_drains_but_does_not_spin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bcdab38-9fce-4bbb-8b84-c5a3a38d1b63/tirawufis.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/zojonivaxipevasuboluveve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1720b41c-4dc3-42ac-bef8-53b46a9192e7/innova_3100_abs_manual_espaol.pdfIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_c510269e293947c19e745390dd25ffac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/email_format_for_job_request.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/bintang_bier_logo_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec425fa9-fb3e-4d14-a541-a8bcc6cd41f3/lincoln_mig_pak_140_vs_140_hd.pdfIn PDF document text
    • https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_32487187f0c1486fa10f30ed9084c872.pdf?index=trueIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/baberadade.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_29d3b458719045eeaf453fd1c495522f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5b2f3a0-0867-40de-a4c8-3a7c8ce0aa4d/what_trail_camera_sends_pictures_to_your_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/577e3316-4152-473d-8275-958ac64b0977/how_to_clean_whirlpool_self_cleaning_water_dispenser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a46eec-3a86-453d-aa90-0ab1c8f58466/68415694364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1ab4211-0ff6-4079-81df-8395e478332c/kenabowatubeva.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/canon_powershot_a560_sd_card_size.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_off000178ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178AD 5248 bytes
SHA-256: 96f71fb0edc4d57ac6575f12f55bf1734d98436980a37bc7c37fd8fe58718fad
font_01_sfnt_off00018a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A95 14000 bytes
SHA-256: 3da4e8b703585d0806240faa53dee23d6fcbacc2b4a34ab257d21258e783fbd9