Malicious PDF — malware analysis report

Static analysis result for SHA-256 807649993b6bbf78…

MALICIOUS

PDF

80.6 KB Created: 2021-03-15 21:05:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 29f8cb39b6e29d062ce94ab8a4c39414 SHA-1: 9494df673e412d570e0b8acb631a28bb2a741992 SHA-256: 807649993b6bbf781b3e67e7eb18e941506fa3b27ca0da93addcdea0d87bca52
186 Risk Score

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. 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 0.9996

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://pelibifir.ru/123?utm_term=speech+writing+format+for+students PDF link annotation
    • https://mibarepazakeme.weebly.com/uploads/1/3/4/6/134685426/6520882.pdfIn PDF document text
    • https://funapimezu.weebly.com/uploads/1/3/1/0/131070883/efe12237.pdfIn PDF document text
    • http://hookup153.space/desmitificando_la_gerencia_del_talentoic2wq.pdfIn PDF document text
    • http://alexandreablog.com/itil_foundation_exam_study_guide_free_downloadlvntm.pdfIn PDF document text
    • https://wupanotowi.weebly.com/uploads/1/3/1/4/131406855/5504711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389101/normal_60361324dde74.pdfIn PDF document text
    • https://bibatuzasofobi.weebly.com/uploads/1/3/4/8/134879938/setaridubejogonode.pdfIn PDF document text
    • http://chambrehub.xyz/redixufevlskxo.pdfIn PDF document text
    • https://wugovokida.weebly.com/uploads/1/3/4/3/134319073/vusiwotadesi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473053/normal_5ffd58e56ac2b.pdfIn PDF document text
    • http://cashtanks.fun/pilgrims_progress_movie_2008m2n3a.pdfIn PDF document text
    • http://bhd-management.space/dominos_pizza_menu_australiav8gni.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/346f295b-d4d2-4d16-b492-7d942552e72a/free_printable_disney_cars_2_coloring_pages.pdfIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_a1a17e8907974e3ea4c706490eb9ddbe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fdca3cc-5774-4eff-84ed-7fd7306fb47b/96427150477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f59c45-d112-4712-a482-870dd84c07d4/can_you_replace_the_earpads_on_beats_solo_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6298faa8-b7d8-41cc-b2c5-20828dd1bfc1/what_is_coming_to_netflix_2021_uk.pdfIn PDF document text
    • https://484a0fbd-04e0-416f-b335-41eb3f66808b.filesusr.com/ugd/228afb_17c957e84a3045409462b6677bb14d0f.pdf?index=trueIn PDF document text
    • https://790dbb52-30bf-47b2-9b56-a69c72000c25.filesusr.com/ugd/f9d4cd_8eb774bc40cc420c919fad1671285e06.pdf?index=trueIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_06c4b587abd04956aef002bac045825a.pdf?index=trueIn PDF document text
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_42836bb943ef4da983d33f61a2c240d2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b49a42-6f61-4c0d-9eea-36bcda986030/9892165814.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_off0000fce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE6 5732 bytes
SHA-256: 0089158819273f90e00fc4d0aa8cff559ff49b6aff7aa4925e144b02f9b34325
font_01_sfnt_off00011057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11057 10696 bytes
SHA-256: d7c8b38e7d34d788bded17e8b2bd9e604a0425e0b43c9fc1d8b0be063af6f8bb