Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4db29d5dbe2a09…

MALICIOUS

PDF

89.9 KB Created: 2021-04-05 13:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7a8cee4e48733c5c27342f15a7cfc02f SHA-1: e455fd11b67c98553c9191fe4f54b88af52fdea8 SHA-256: 0d4db29d5dbe2a09c3b41495a23cbf63acedf82351abf2f7c65c636000a72876
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful external content, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/wix?keyword=igbo+traditional+justice+system PDF link annotation
    • http://hardcreditcheck.info/a_short_history_of_progress_chapter_1_summary0uo6q.pdfIn PDF document text
    • http://fruittea.space/fragile_states_index_2020vko86.pdfIn PDF document text
    • http://openplafond.xyz/vubivakuwonuxenibipewank8.pdfIn PDF document text
    • http://fevalugumaj.22web.org/how_to_do_code_freeze_dryers_work.pdfIn PDF document text
    • http://sandwichhq.club/dorubagimqj59z.pdfIn PDF document text
    • http://tb-films.ru/wurebipikawfxjec.pdfIn PDF document text
    • http://agent-ritual495.online/vunalabogoluwusapep1gdx9.pdfIn PDF document text
    • http://gprofights.ru/bleacher_report_live_xbox_onenwi0a.pdfIn PDF document text
    • http://itdiscounts.pro/14478612822rbwpm.pdfIn PDF document text
    • http://ramedefinu.getenjoyment.net/bixim.pdfIn PDF document text
    • http://kebuwakuje.medianewsonline.com/60925603222.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_ddbfd84e300b4570a88db4405951d8fa.pdf?index=trueIn PDF document text
    • http://dimazobuxijema.epizy.com/organic_chemistry_notes_class_12_free_download.pdfIn PDF document text
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_0ecc6eb14ced4f5ba5e896ab58cd19f3.pdf?index=trueIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/23961843053.pdfIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_15b92c33e5ca44cead4b49637a325b58.pdf?index=trueIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_d8f2aeded3fb455a98baa186ae6adbc9.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_off00010cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAE 5512 bytes
SHA-256: 7993750101c39b386af7dd8bb11627265aebf2f3810ac54a7f56be3f102425c7
font_01_sfnt_off00011f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F62 10540 bytes
SHA-256: 98733154c5bb6b05248b5030df8590438f80c7133ad1fbedd73422701a39319f
font_02_sfnt_off0001438e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1438E 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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