Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af804ab49f7ab7d…

MALICIOUS

PDF

87.1 KB Created: 2021-04-28 23:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0652785a532505bf94f1e689a8901214 SHA-1: 232981222cd238593dc62a9245e8bde5c9467edc SHA-256: 0af804ab49f7ab7db1dc4318a276298ae7ec1b0804bcd8464cbfdd236cd216b5
154 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including external URI links and a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan delivery document. Although no scripts were extracted, the presence of numerous suspicious URLs and the 'download button' lure indicate a high likelihood of the document attempting to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/strik?utm_term=kenmore+elite+dishwasher+665+parts PDF link annotation
    • http://ontrade.top/auto_chess_piece_placementnhdy9.pdfIn PDF document text
    • https://gunarolapikomi.weebly.com/uploads/1/3/4/4/134442839/6158721.pdfIn PDF document text
    • https://dugumali.weebly.com/uploads/1/3/1/4/131437411/zekewununomowewomoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454982/normal_5fe679203704a.pdfIn PDF document text
    • https://geripefuni.weebly.com/uploads/1/3/2/7/132740274/gofatutu-bakaf-soresu-fonokox.pdfIn PDF document text
    • http://gobigs.space/boston_university_campus_mapxy87n.pdfIn PDF document text
    • https://mapijilut.weebly.com/uploads/1/3/0/8/130873952/f605562ac5c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411922/normal_605c5fc4d85ee.pdfIn PDF document text
    • http://rostov-mobile-doctor.ru/bemuj32ti7.pdfIn PDF document text
    • https://tujowijide.weebly.com/uploads/1/3/0/9/130969571/51cd604885ab27.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/ohfp0tG/63455104139.pdfIn PDF document text
    • http://copyrightnotice-ig.com/romeo_and_juliet_act_1_scene_5_lines_46-55_ironyg9l9v.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/daijErv/battleship_game_hack_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/hjzNcr8/inside_out_joy_and_sadness_get_lost.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_ab0a3b1f707b41ec9c560853b9e1838a.pdf?index=trueIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_ed96e5c41d4841b28ec1bd2da6d7bcec.pdf?index=trueIn PDF document text
    • https://995be609-08d3-41b1-a6c0-90e53670bcec.filesusr.com/ugd/9988e1_01a59f30c32a4ed8859e6399568f9d56.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_off000114e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114E8 5536 bytes
SHA-256: f7d0fe0e814518d50c7d7b3b27b1a39bb62dd0c09761fd0cbbc803eb36eaa485
font_01_sfnt_off000127a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A7 11696 bytes
SHA-256: bcbbaf93ad68c8c3b8b241fa2eee249f04427466eccb7dcec11b9b2d90bdc5de

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