Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6e778dc8d22b73…

MALICIOUS

PDF

72.9 KB Created: 2021-04-07 02:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 559cb88f8bfe2895f4e9b088fb6d8db8 SHA-1: 89179ed644d5045447556951eb5d31ba8df518c1 SHA-256: 6b6e778dc8d22b739137b5b2cc70dc363e4e87db0cfc84b3bc97292447e9d9fb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/strik?utm_term=dirt+devil+vacuum+filters+f112 PDF link annotation
    • http://xtrading.buzz/soccer_coach_quotes_funny4e58e.pdfIn PDF document text
    • http://prostotit.site/48262509003r18fj.pdfIn PDF document text
    • http://buybritishcat.com/application_for_schengen_visa_italyynmey.pdfIn PDF document text
    • http://catsism.com/radians_to_degrees_formulaums7w.pdfIn PDF document text
    • http://giftcard-sale.store/46018237598r6t7e.pdfIn PDF document text
    • http://sakhavto.ru/advantages_of_sexual_reproduction_over_asexual_reproduc4hxco.pdfIn PDF document text
    • http://afracheat2.xyz/delosorozalakebeyvxu7.pdfIn PDF document text
    • http://autobuff.xyz/everyones_an_author_with_readings_3rd_edition_freeune1g.pdfIn PDF document text
    • http://reduslim-eu.site/vekazanudugurazewekoy1oe2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_8bb0d72f1036411899443dca2437cabf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e78b66-5e3a-46ec-b3e8-2e0539f5cea2/mozasuvewonewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51444cad-a7c1-4a7e-90b3-e6e843098119/vojebod.pdfIn PDF document text
    • https://109d6476-c6f4-4eee-b84c-907698fb4207.filesusr.com/ugd/0d7ebf_5b2153b659bf482dbaaec71f05994c96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fukepez/ct_ghp_online.pdfIn PDF document text
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_1dd5fc6c2beb4099a08894db01fcaea7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a37db38e-cb80-4407-9edb-344b40ff956e/halo_the_fall_of_reach_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/anticlastic_forming_tools.pdfIn PDF document text
    • https://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_4cc80d4a883443588a97c77347dafa73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/risisipajole/mogejasitunole.pdfIn PDF document text
    • https://30dce114-5b7d-4ba4-aa44-e083516804ec.filesusr.com/ugd/7de0fd_f6df5d9ff6eb4b2f88d424863a72a2bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/92fef946-85fc-43c6-8d69-1c6f1084f280/59222804376.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/what_are_the_3_rules_of_composition.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_off0000da61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA61 5408 bytes
SHA-256: e91569c5442ff31286a1f5381aca9609c28f4d287d86152aa57e70c18f7adc72
font_01_sfnt_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 12540 bytes
SHA-256: a67b095353d5a2568a245e1e2a13694539c93b063a6275c9895ab8469b57522a

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