Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf195343f60e5770…

MALICIOUS

PDF

83.7 KB Created: 2021-03-12 10:59:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5b48b8038f161f04291db70b990d5451 SHA-1: b953c954a786296a8eddfa4adbf238e6e0ff75f2 SHA-256: bf195343f60e577065ba7c12e98a584231de14815f0e6c6702faee357464060b
186 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 0.9997

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://dafemum.ru/wix?keyword=poe+uber+izaro+guide PDF link annotation
    • http://site-shop.xyz/29952670151t0u19.pdfIn PDF document text
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/limiwuwa.pdfIn PDF document text
    • https://wujatukeki.weebly.com/uploads/1/3/1/8/131856991/vegefediraxiwiji.pdfIn PDF document text
    • http://jurofenopoxu.iblogger.org/neurofibromatosis_dermatologia.pdfIn PDF document text
    • https://fapuwokezisojo.weebly.com/uploads/1/3/1/4/131453853/9434664.pdfIn PDF document text
    • http://maska-respirator.com/flashlight_mp3_download_planetlagujop77.pdfIn PDF document text
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/tutotodejagoze.pdfIn PDF document text
    • https://begatidevu.weebly.com/uploads/1/3/4/5/134596010/kapirire.pdfIn PDF document text
    • http://genusadnlo.space/jovobuxijubukofufuvudk54yu.pdfIn PDF document text
    • http://future-techno.ru/android_app_notification_icon_sizeplp6v.pdfIn PDF document text
    • http://fredo.bike/gotranscript_answer_key38sfc.pdfIn PDF document text
    • https://sukanogijero.weebly.com/uploads/1/3/4/3/134333185/fasefonuta_muburu_xodiwola.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pewijaxenutudum.rf.gd/john_dewey_education_philosophy_summary.pdfIn PDF document text
    • http://pepojugatidi.epizy.com/pisowosikivokepo.pdfIn PDF document text
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_24264f8508144e478ae958b5a873c02d.pdf?index=trueIn PDF document text
    • http://nowaginog.epizy.com/gulixemejujowuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9c24e4-256c-4a54-a6ca-fdc3a37cbf52/foucault_2008_the_birth_of_biopolitics.pdfIn PDF document text
    • http://jifigazanovew.epizy.com/pdf_to_autocad_2018_converter_online.pdfIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_007496ad5c044179ba926870ff61e4a3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9875da5b-7bb0-407e-9cca-5b7bcf700df8/jorimiwatasuwiwa.pdfIn PDF document text
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_10d9189b277d4bca8dcd0f29a9970eca.pdf?index=trueIn 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_off00010cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBA 4976 bytes
SHA-256: ade04ab5a13ee076b985ee2edb3cd858e345bce23a15bc95b8d710ff52c972bf
font_01_sfnt_off00011db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB3 10632 bytes
SHA-256: 70848d66935c527322ca52986872bd11fda7f49a646042bcff78ee8d24dbf85b

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