Malicious PDF — malware analysis report

Static analysis result for SHA-256 314268da178bb11b…

MALICIOUS

PDF

69.4 KB Created: 2021-03-12 04:49:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4d117076783f055aa678354420306438 SHA-1: 848e1fb9b4754154c3200ba30bb6760f35eb1978 SHA-256: 314268da178bb11b3faa4a0ee139b5b5d1fb4d2de1ca58cd26aee8f847463b60
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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.
  • 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://soxebez.ru/strik?utm_term=linear+and+non+linear+text+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4493266/normal_60301bf1a2540.pdfIn PDF document text
    • https://cdn.sqhk.co/megilujij/jagfhgq/pefodagikovos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413113/normal_5ff240368d482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_600f87fb759c1.pdfIn PDF document text
    • https://cdn.sqhk.co/doparibi/iar6Fig/bronze_age_definition_and_example.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465012/normal_600b50d930249.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/ihj2ig3/come_creare_uno_sticker_whatsapp_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/gehatid/water_meter_reading_practice_test.pdfIn PDF document text
    • https://cdn.sqhk.co/dederubap/bmhOyig/lucky_block_command_ps4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452385/normal_5ffbe5b00cf02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417039/normal_6006b04bb9a9d.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/jeBidg4/kozipirazowuxof.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuguxovim/jjdhfgg/dimple_bts_piano_sheet_music.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/b98ce99b-6632-47be-aa9b-6cd708ddfb2d/denon_x4000_service_manual.pdfIn PDF document text
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_0e9af5410c6a466aa8224932497c43a1.pdf?index=trueIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_776121194c3e4a188773ab3951f42f57.pdf?index=trueIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_98b1c02dc2604ebe8af81063e793bac7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c3da59-5fe7-4ef5-b1c3-1b413b7243d2/72701867753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc0c75b-4e4c-4a81-9a2a-5cd9372f5b50/vepuf.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_off0000d280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD280 5292 bytes
SHA-256: 69414b26eec3975a64903924c789f9516169583d809bae2eff9f9f067381c9eb
font_01_sfnt_off0000e498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE498 10020 bytes
SHA-256: cf2aa73d67db316422370bcb545c2f3d9ebee9ff565874391ae952a785250fc0

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