Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aeb85e3d0f51fe1…

MALICIOUS

PDF

77.5 KB Created: 2021-04-08 20:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cefbf40e9b88a36d47d2159413120048 SHA-1: ee1049b80faea708e5bc84fe011a0d2b8c482976 SHA-256: 5aeb85e3d0f51fe1f3235b0ef7ee39f16fa08bdad22a9c8fe41d8ad666de4bcb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=roadmaster+granite+bike+24 PDF link annotation
    • http://rerikadarax.iblogger.org/koxurovutifapofapofosafeg.pdfIn PDF document text
    • http://instasale.company/american_civil_war_map_timeline96l0m.pdfIn PDF document text
    • http://busurman.space/gupelimoluxifovolipeg7682.pdfIn PDF document text
    • http://accueilcmb.com/enfoque_mixto_segun_sampieri63k6u.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/captivate_vanessa_van_edwards_download.pdfIn PDF document text
    • http://zarabatyivat.ru/fisher_wood_stove_price12dw1.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/lirakugewululebejebisi.pdfIn PDF document text
    • http://vatidenow.medianewsonline.com/xoxezetefujatonupesowa.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://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_589ff1b4f3c84e6f884f682914464d0d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d62966-4cde-48e5-9bbf-2059b2a87499/54329494310.pdfIn PDF document text
    • http://diduzivil.epizy.com/financial_reporting_hotel_industry.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_31417e28ba6e4b4d9299a98723ebecb0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/512af455-8f66-48f2-9126-e29dcba1a8b0/gekonekidudofawemawiladu.pdfIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_c70035f051b24d3ca271a3470c6ad1ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/modernist_cuisine_special_edition_baking_steel.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/webasto_diesel_heater_fuel_consumption.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e0609e4-3893-407f-a1dc-fe0ab2d7606b/tuligemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f108bcdc-527d-4f00-b72a-f90dcd7a28fc/instep_bike_trailer_hitch.pdfIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_de15e365476f4ef6b031fed1c4f86528.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62838532-701d-4500-b8e4-4094026d002e/remington_700_308.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_off0000e352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE352 5332 bytes
SHA-256: cae27e441656b009b9c0fa3c8cf57e4968a8509956ec2641c1baf4950f513615
font_01_sfnt_off0000f565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF565 11004 bytes
SHA-256: 233b29a2094b24a02bd21bb215c0a09e7df522dd9a92e2610be89c567939f0a6
font_02_sfnt_off00011af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3