Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b01d6e967ccf9cd…

MALICIOUS

PDF

82.2 KB Created: 2021-05-20 18:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 925ea5daeeee0cf0015b05e8bdee8461 SHA-1: 9c8be2011286a9fe24699875b1b59297a7f00b80 SHA-256: 5b01d6e967ccf9cd866a46f0e10be089192cc3d704fd852c969b0537afc9a61a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The document body is heavily obfuscated and appears to contain junk data, but the presence of external URIs and the overall structure strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://jumiwimov.ru/strik?utm_term=benvolio+character+traits+act+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443341/normal_602c4b9d938ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379377/normal_605d83fc7a078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452607/normal_605793fab8d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445333/normal_606a41a787129.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/1401556.pdfIn PDF document text
    • https://tavulejitozusol.weebly.com/uploads/1/3/0/8/130873759/kiwekatujiru-vavexolirol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_60344360a9331.pdfIn PDF document text
    • https://boxorefo.weebly.com/uploads/1/3/0/9/130969922/8192086.pdfIn PDF document text
    • https://xutagevobufoj.weebly.com/uploads/1/3/1/6/131607169/ebadfabf78.pdfIn PDF document text
    • https://malomunadososep.weebly.com/uploads/1/3/5/3/135351096/4d17cb.pdfIn PDF document text
    • https://nomozusosowewox.weebly.com/uploads/1/3/1/4/131453154/zitifid.pdfIn PDF document text
    • https://domemasajexal.weebly.com/uploads/1/3/5/3/135304114/d6a36fd842e5534.pdfIn PDF document text
    • https://nezubarenegutel.weebly.com/uploads/1/3/0/7/130776328/6360196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414873/normal_6014f4732e2af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474979/normal_606e3369e68c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493550/normal_60187d3728c82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465259/normal_60391c4827873.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489994/normal_6000ac269204b.pdfIn PDF document text
    • https://gifoxulexup.weebly.com/uploads/1/3/4/8/134865115/vusoxubaleb-wokower-doxak.pdfIn PDF document text
    • https://nezododirexu.weebly.com/uploads/1/3/0/8/130813510/6550e2381800.pdfIn PDF document text
    • https://torudedo.weebly.com/uploads/1/3/4/3/134352944/kaxasa-piferuzusi-nunefo-nagovureremirav.pdfIn PDF document text
    • https://kilewesiviteki.weebly.com/uploads/1/3/1/1/131163613/towaledaruxufa-togevu-gobakomija.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/zogezetozuvitunefaw.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/sizedoduxi.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/application_blague_telephonique_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/does_procreate_work_with_ipad_7th_generation.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/add_action_bar_icon_android.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_off000103a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A2 5160 bytes
SHA-256: b8abc530b084ff9d408f06a3d17494d18739860daf689fcfa557ee23527043f2
font_01_sfnt_off00011532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11532 11444 bytes
SHA-256: 621f8ab43b4c246249724edb195eb9354781d8581a68a06ee7dae4627cb6cec9

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