Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f788b08e70f48c…

MALICIOUS

PDF

81.3 KB Created: 2021-03-11 04:41:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c0b6118926ff88fe007f5174143f121d SHA-1: 25b245f3d2dd9ba1133423402ca82e28f157329c SHA-256: 04f788b08e70f48cce787369d75df88130a269c15331c3724ff0e860101ae727
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, characteristic of a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document's content appears to be a lure, using a search query as a pretext to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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://botokaw.ru/strik?utm_term=what+temp+is+high+setting+on+slow+cooker PDF link annotation
    • https://cdn.sqhk.co/fanasuzajem/wMoibje/tedosubivasa.pdfIn PDF document text
    • https://boletesolekab.weebly.com/uploads/1/3/4/2/134236379/modarorixus.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/6RNAgdN/mini_boxing_gloves_rear_view_mirror.pdfIn PDF document text
    • https://jejonogukoji.weebly.com/uploads/1/3/4/8/134864124/7e29ee5.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/mipowozijuve.pdfIn PDF document text
    • https://fumadutukit.weebly.com/uploads/1/3/1/4/131437402/9f803.pdfIn PDF document text
    • https://dilaxala.weebly.com/uploads/1/3/4/8/134865885/6056548.pdfIn PDF document text
    • https://makifilibavik.weebly.com/uploads/1/3/5/3/135383918/bizidalefefi-raxesut-vinuvu.pdfIn PDF document text
    • http://xilexevu.scienceontheweb.net/paint_cannot_open_jpg_file.pdfIn PDF document text
    • https://keromarire.weebly.com/uploads/1/3/0/8/130873863/e12ee3fc.pdfIn PDF document text
    • https://xorukulimuz.weebly.com/uploads/1/3/4/7/134728044/gexif.pdfIn PDF document text
    • https://biwasigefo.weebly.com/uploads/1/3/1/3/131398444/tasuwefar.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/gp7sicd/73479656804.pdfIn PDF document text
    • https://remitibomuko.weebly.com/uploads/1/3/4/8/134853657/69da2aad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e25f08e2-ce51-4f6c-a7af-ec695b5bfab7/diwixijezetikovomo.pdfIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_6219ab43a57043f8b0b5569c3ecd0681.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d5a01b-5fd3-4958-a99c-968ed61bc8bd/dusef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6697515c-92b6-4979-b657-0311b4b285d2/kenmore_elite_dryer_clean_out_lint.pdfIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_f63e0dbe81234ae4a3ea968bab247194.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7bbf4e8-edc7-4ce6-ac3c-a7db4a2ec40e/zazuzebilanesizuwurodekug.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/25232088279.pdfIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_dd8c3dffb6184b28b6c4eda0b820cc2d.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F6 5304 bytes
SHA-256: c49292f1e7772ddfca480c77cbc813770b9d8b0f61c9fcdb14b72e29d5a6f339
font_01_sfnt_off000103ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103ED 11000 bytes
SHA-256: d134d5cf5ab49d01639ebf17b7e86423cca5e013098e7805a4e1619dcafdcb59
font_02_sfnt_off00012985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12985 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378