Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc110ce2f84c41e…

MALICIOUS

PDF

83.2 KB Created: 2021-03-29 13:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 219c3535c932c9153c19eb7c5c0f79cc SHA-1: 7110943216809adef0774a6dee6686c7572cf05b SHA-256: 0fc110ce2f84c41e15e024ae2eb262f933bb06e001b763225afb98e6ec4202fc
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://nipisod.ru/award?keyword=caselet+di+pdf+ibps+po PDF link annotation
    • http://sumapewub.getenjoyment.net/98196689689.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/djfijhg/events_in_atlanta_next_weekend.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/47447250761.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/ig1BCjh/dragon_quest_11_costumes_stats.pdfIn PDF document text
    • https://cdn.sqhk.co/jaruxabal/rgigejb/carson_wentz_contract_per_year.pdfIn PDF document text
    • http://ketoxitigojaluk.sportsontheweb.net/ligotanedixonet.pdfIn PDF document text
    • https://cdn.sqhk.co/jelasusoved/idjixgg/kokavivez.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/xusadusibozotevuw.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/99c9895d-2c2a-40be-8abc-fce2a784078e/3083297888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/774ee2e5-0bd7-4de1-ad8e-41d72db312ae/katzung_pharmacology_board_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35f4ba2-9e4a-44c2-a347-a65baa53e55d/how_do_you_heal_your_soul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb13abe0-d18b-450d-ae30-84e48b8112b8/how_to_assemble_total_gym_fit_max.pdfIn PDF document text
    • https://eb22cd64-ba88-4d74-9269-d2b8937e52af.filesusr.com/ugd/3b217d_1d80b90183ab45a3aab020a055d13875.pdf?index=trueIn PDF document text
    • https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_1ad572c8e420459b9c7cd265ed4d5323.pdf?index=trueIn PDF document text
    • http://pedorusare.epizy.com/50573711171.pdfIn PDF document text
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_6629fe89b96a41b4ad2261284f9d9eba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb03b55c-9d0b-4546-8339-ae29e16a3cc0/harley_davidson_repair_tools.pdfIn PDF document text
    • http://vumojixo.epizy.com/burndown_chart_template_google_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e3e753-de70-4b49-b329-857c72507dfa/how_to_change_the_filter_in_a_lasko_tower_fan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd3fed3-873d-4da4-9f5f-21fcc27bd12b/7152195948.pdfIn PDF document text
    • http://lumalidik.atwebpages.com/wizukawad.pdfIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_4af67f77c737430583635e7f6fb36ead.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF261 4984 bytes
SHA-256: 8600efe7b7eccea7132dc890436c0bf8fc6c2123513b7ffb24737c2abdc99323
font_01_sfnt_off0001035d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035D 11472 bytes
SHA-256: 3ee9470e53530ae586165340ebab7531bd94efdfa2f0a95e6589c42b5a05b53a
font_02_sfnt_off00012a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A66 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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