Malicious PDF — malware analysis report

Static analysis result for SHA-256 0692265738078912…

MALICIOUS

PDF

79.9 KB Created: 2021-05-07 01:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f2f87ab9fb21510125db1afcd0a0e515 SHA-1: 6bc392b5d9b6634416144269347da3c7a5f42ea9 SHA-256: 06922657380789120fe94d33249626587c642dc155023b92fe165f2bc73f4513
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the presence of numerous URLs and the heuristic findings suggest the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://jottigo.ru/strik?utm_term=esv+study+bible+large+print+indexed PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422148/normal_5ff684414c498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_601edcda69ff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384649/normal_600a2778a4258.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
    • http://parorusoba.rf.gd/45870763401.pdfIn PDF document text
    • http://rowofasetadoxu.epizy.com/the_outer_worlds_game_guide_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2e4e2b-f091-47fa-8423-0fb6bd80dff0/home_zone_security_led_light_2500_lumens.pdfIn PDF document text
    • https://b7b9a0d4-d71d-433a-9dbc-8293b1c729aa.filesusr.com/ugd/979434_69997a3d3c324f85bab288f0cceddcb7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/vivofit_jr_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c00a581-a18d-40f4-8151-e2def741adbd/why_is_my_samsung_monitor_not_working.pdfIn PDF document text
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_71b1fc3153ea4ec5b0bb3d1e0d651bea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/4-_nitrophenyl_chloroformate_uses.pdfIn PDF document text
    • http://boraxijud.epizy.com/bibenabenopepijatipov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1908f456-cfcf-4afc-b7bb-b712c283c2fe/vepiwikume.pdfIn PDF document text
    • http://dekidad.epizy.com/82937387692.pdfIn PDF document text
    • http://xatudoxi.epizy.com/nolorinonajopagugetotew.pdfIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_8ad091e6ec13443084499f0e71a133c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/304cc681-ef34-42aa-91c6-cd954c08a68f/65158812186.pdfIn PDF document text
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_2b09cd234dca46f894d2375cb514c9d1.pdf?index=trueIn PDF document text
    • http://zorogeloma.epizy.com/19835031236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a60c9e9-1d4e-4003-b710-a95a4e7df902/16673477637.pdfIn PDF document text
    • http://duwagisu.epizy.com/all_integral_calculus_formulas.pdfIn PDF document text
    • https://79ab8074-8148-4faa-9219-f6cdfa35bc15.filesusr.com/ugd/99e004_3dc0a9ae733c47b59cded93477a195b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gopuze/what_does_the_v_sign_mean.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB7 5224 bytes
SHA-256: a748f07ee9efe1dc751bcc190e16a49419f8e7f7747ad76b9f9952b23afc3424
font_01_sfnt_off0000fc8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8B 11512 bytes
SHA-256: d66d58ae48ac63a7c507dd08d04d24e1b18752ac555c9154c56233f0e796b5f9
font_02_sfnt_off000123c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176