Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e202430ad40d91c…

MALICIOUS

PDF

81.8 KB Created: 2021-03-22 23:45:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17813348c13621e6fd29d007b3defe4c SHA-1: 7b8ba30a765b03cf8be7eea8ba150b968e80977c SHA-256: 9e202430ad40d91c1764da2f2bfe3cf2791709a8e3cdf91053c4900ee2dbabcc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm and a phishing/malicious PDF. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=shark+rocket+ultralight+upright+vacuum+reviews
    • http://kyukty68.xyz/29662928498oj0s8.pdf
    • https://cdn-cms.f-static.net/uploads/4373526/normal_6021514e7c56d.pdf
    • http://help-feedback-amzn3.xyz/assassin_s_creed_rogue_hacking_guide7yznt.pdf
    • https://cdn-cms.f-static.net/uploads/4447669/normal_6016f66e607df.pdf
    • http://ita-bio.fun/warrior_cats_rise_of_scourge_read_online_free8ga5y.pdf
    • http://espacecmb.xyz/tumesudujuxijuzufueaw.pdf
    • https://static.s123-cdn-static.com/uploads/4377101/normal_5fc88acb31bc5.pdf
    • http://liketime.online/fajovidorexokokfpimj.pdf
    • http://keto-s1.com/the_prince_kiera_cass_summaryllumo.pdf
    • https://cdn-cms.f-static.net/uploads/4477629/normal_6015d6c1c4ccc.pdf
    • http://how2clever.com/fixatewufoje6q14q.pdf
    • https://cdn-cms.f-static.net/uploads/4502188/normal_60243d4b72c0d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/87604d44-3df3-4a3b-9813-83628e8551b6/wadesoselenesufuv.pdf
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_0388605866c042d79895ee01e341bee4.pdf?index=true
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_a1ffd4ef887f48aca51bac2feb71a8c9.pdf?index=true
    • https://b2fc43c4-60ab-4dc1-a1c8-84833fda4e2a.filesusr.com/ugd/37321e_d44fc2aa21f3405a86408792010fbf74.pdf?index=true
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_d17ea23a042d48598c3fdb6a742d5b20.pdf?index=true
    • https://uploads.strikinglycdn.com/files/746e5554-2827-4d74-af74-9501d1b7590c/internal_combustion_engine_animation_video.pdf
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_b3f6b6aa110a4c57b42f353aff02582f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/32680132-c22c-48e0-a285-e5777c5ade95/the_intention_experiment_book_review.pdf
    • https://uploads.strikinglycdn.com/files/5ab5703e-6ce4-4d3a-800c-a36561e5cbea/4386213947.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe5a.bin
ee4d3e57e11216573d31abc630f82861972ffb46ccdffa85a72db0c3f78302a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5A 5668 bytes
font_01_sfnt_off00011188.bin
c0db410e5fd91abf4cb9e06f5711a38b33697eff703eff3f53a74ee9872726dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11188 11320 bytes

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