Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e741c7ebf8b4d1…

MALICIOUS

PDF

80.3 KB Created: 2021-03-19 09:24:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1732f4a858e33bd71d1de15d70611b06 SHA-1: 85eef786b2cf68c858a1b9997f068db7a0dc4704 SHA-256: 92e741c7ebf8b4d154114fa9a113c0ecb50a570c56f8be2e6334567b020908ac
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, many pointing to disposable hosting, suggests a link farm or SEO manipulation tactic. One of the primary external links, 'https://xezojetit.ru/123?utm_term=removing+asbestos+roof+sheets+cost', indicates a potential lure related to cost information, possibly to phish for user credentials or direct them to malicious content.

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://xezojetit.ru/123?utm_term=removing+asbestos+roof+sheets+cost PDF link annotation
    • https://forerijekakifur.weebly.com/uploads/1/3/5/4/135401119/9450ca6902.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/how_to_export_midi_tracks_from_garageband.pdfIn PDF document text
    • https://nodirerivono.weebly.com/uploads/1/3/6/0/136052085/7cf65dbbdd4645.pdfIn PDF document text
    • https://zabapekiji.weebly.com/uploads/1/3/4/4/134470890/2517272.pdfIn PDF document text
    • https://zolagefotatol.weebly.com/uploads/1/3/4/7/134709454/6952722.pdfIn PDF document text
    • https://dakesepev.weebly.com/uploads/1/3/4/3/134308776/2103494.pdfIn PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/6f18e2.pdfIn PDF document text
    • http://galabogenezoso.getenjoyment.net/colleges_with_interior_design_majors_in_virginia.pdfIn PDF document text
    • https://ferijivoko.weebly.com/uploads/1/3/5/3/135327637/09c8c6.pdfIn PDF document text
    • https://loraxero.weebly.com/uploads/1/3/4/3/134332649/naburinogit-sedomoru-zugafis-wetajodesepibeg.pdfIn PDF document text
    • https://gekeforoka.weebly.com/uploads/1/3/1/4/131438206/leduferoler-sediworoza-pilakuwu.pdfIn PDF document text
    • https://gamajebijapam.weebly.com/uploads/1/3/1/8/131856653/65c7a71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://459fb65c-52af-4c88-885a-43a44fbeaf25.filesusr.com/ugd/6a7407_cf1fd3cc8ded4f38844e0f74f4e8971a.pdf?index=trueIn PDF document text
    • http://sebokegekesuded.atwebpages.com/materi_olimpiade_biologi_sma.pdfIn PDF document text
    • https://fec450ea-b80f-4746-b851-35139cc02de5.filesusr.com/ugd/53a83b_7e2ee374ea3d4fe3bdb4a161fda711b4.pdf?index=trueIn PDF document text
    • http://sajetubaj.epizy.com/browser_video_player_android.pdfIn PDF document text
    • http://vugikalijuboxo.epizy.com/wodepewu.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_ba81d6257b7749459ff6bc2414a758dc.pdf?index=trueIn PDF document text
    • https://777dd155-384c-4f1d-a337-8f27b94bb056.filesusr.com/ugd/1ecdae_14ee70acad91488dbc5636d3efd459fd.pdf?index=trueIn PDF document text
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_e1c5a47124a7486ea8c96cac675988bb.pdf?index=trueIn PDF document text
    • http://vafikozokus.rf.gd/redelolizezufonobajajanus.pdfIn PDF document text
    • https://e1d5fa5a-667c-4d22-bb72-2ec96b4ed0f7.filesusr.com/ugd/01f30d_8d605fc9e39a478389d9cf2632e88ae5.pdf?index=trueIn PDF document text
    • http://xivubijorudi.epizy.com/owasp_certificate_pinning_guide.pdfIn PDF document text
    • http://telusomabufa.onlinewebshop.net/aluminium_alloys_for_aerospace_applications.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_off0000f9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A5 5472 bytes
SHA-256: 98b940a3e8abb0a66cc14cc990e1fde772d29dab4accfe4b6298e4446864d025
font_01_sfnt_off00010c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C26 11636 bytes
SHA-256: d56adce5f6b556fb58851cd1afc306d65e6f9c25d7a0745039577677d0a88251

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