Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6be56c62303807d…

MALICIOUS

PDF

79.6 KB Created: 2021-04-02 21:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3d5cc0f78a3342f14b74ffe98b7a4e1 SHA-1: 60470315c2162c3eb97671f994488f120d941d74 SHA-256: f6be56c62303807d1a66e3336c847124a32ede1820dc852757487183d6dc1fb2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of an external URI pointing to 'dafemum.ru' suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=can+you+make+pizza+in+oven
    • http://tufodudem.mypressonline.com/34409573605.pdf
    • https://cdn.sqhk.co/zopinulepa/vDifRhi/78975711765.pdf
    • http://nesarose.sportsontheweb.net/negapazesig.pdf
    • http://rapisakaxo.66ghz.com/event_management_internship_report.pdf
    • https://cdn.sqhk.co/nudotunaza/g1Widhh/significant_figures_questions_worksheet.pdf
    • https://cdn.sqhk.co/vivokunavu/hdhaKgH/ritegizivopivakisaripegid.pdf
    • https://cdn.sqhk.co/fiduzosi/fZgfPhh/5253259104.pdf
    • https://cdn.sqhk.co/rukugewul/CigCjjv/ariel_vocal_coach_dead.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_3196876ebde14e0ab9e28d0dba7e6a72.pdf?index=true
    • https://s3.amazonaws.com/setaxilitozuko/vehicle_hang_tag_template.pdf
    • https://s3.amazonaws.com/woneketelak/bevipimekajonutovepafebo.pdf
    • https://dfdccaec-9019-42eb-ab8c-14eed22d5f88.filesusr.com/ugd/2e00cc_8c0a7b26f0a5433ab2285c2c009aa875.pdf?index=true
    • http://puxetedategekex.epizy.com/geberar.pdf
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_76cbf5467ca445b4af3333fade16e237.pdf?index=true
    • https://s3.amazonaws.com/fojaxexino/arjun_reddy_movie_in_kuttymovies.pdf
    • https://3e206333-d6ff-4be5-a246-6289f7259d3b.filesusr.com/ugd/973a7d_1824b8d6a4694364821d35f2f929efdd.pdf?index=true
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_935295aaf78a4ec3b22c7cd7c2f77293.pdf?index=true
    • https://s3.amazonaws.com/palikuvexake/5769257167.pdf
    • http://rozevilamires.rf.gd/dafujaxozetivonukilez.pdf
    • https://s3.amazonaws.com/fofeguj/pretty_little_liars_books_author.pdf
    • https://1df32be7-5e6a-491e-80e4-5c558052ef26.filesusr.com/ugd/e02e08_d8a6827fc5094115b561fa2a6d941be9.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eceb.bin
38cb8f8cfb35ce0506d0f24058e6d4ca0def3b7fcd4d186af32288eca3551be3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECEB 4760 bytes
font_01_sfnt_off0000fd1a.bin
7319df9b6e0810d36faf604443cac22787f9149071aa6ff00f6cd896897e0dc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1A 10596 bytes
font_02_sfnt_off00012121.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12121 4324 bytes

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