Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e037d3beabb462…

MALICIOUS

PDF

92.5 KB Created: 2021-03-17 14:08:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6c04a34ccc7a3be768fa7e241a0b09e SHA-1: 7aa99c62ab122da25bb479a23b0cf2ddc612ef89 SHA-256: 17e037d3beabb462733b74b806239fbfef27cb7818b5fa9d25f932b21a9fbde6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant heuristic firing indicating it's a link farm hosted on disposable infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of external URIs and the link farm nature point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jumiwimov.ru/strik?utm_term=tom+sawyer+island+at+disney+world
    • https://static.s123-cdn-static.com/uploads/4449602/normal_60071111ec575.pdf
    • https://cdn-cms.f-static.net/uploads/4499636/normal_60370788e467a.pdf
    • http://dupovim.iblogger.org/best_piano_lesson_book_for_beginners.pdf
    • https://kufidadifijerid.weebly.com/uploads/1/3/1/4/131407945/320aa8061.pdf
    • http://jijufik.22web.org/best_website_to_android_games_free.pdf
    • http://perakaganiw.iblogger.org/bootstrap_user_profile_page_template_free.pdf
    • https://cdn-cms.f-static.net/uploads/4499282/normal_6010703d6fda2.pdf
    • https://zevebijupaxize.weebly.com/uploads/1/3/4/7/134754497/5568005.pdf
    • https://dujapiloxi.weebly.com/uploads/1/3/1/8/131857305/kulevo_pedova.pdf
    • https://cdn-cms.f-static.net/uploads/4369323/normal_60253be42c03a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/266266f3-b346-41a1-b774-0a4a48df8da4/kurusivinanupuzi.pdf
    • https://s3.amazonaws.com/lawakux/xofizusijifirirezan.pdf
    • https://s3.amazonaws.com/vovopafubipu/what_does_service_stability_system_mean.pdf
    • https://uploads.strikinglycdn.com/files/0bd6f997-8ca2-4a2f-9355-702f46c332f7/dark_psychology_101_epub.pdf
    • https://b7d3a0ae-8059-487b-8826-088776693174.filesusr.com/ugd/8d23e4_8fd17eb3bb4b437797abe18eb9a9b981.pdf?index=true
    • https://s3.amazonaws.com/sutawowirosuvuv/62586611976.pdf
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_b92fd1798c134bcc9baaeca615a6fd93.pdf?index=true
    • https://e25b7b56-d8f7-44cb-9276-56428e53d1cc.filesusr.com/ugd/63f3e8_201ce88caf4f4b8aa7ea219e1007fc68.pdf?index=true
    • http://sajififavaw.epizy.com/long_run_cost_curve_graph.pdf
    • https://uploads.strikinglycdn.com/files/18f0b06b-7bd3-453a-989a-857dc745a473/xuferorekiwodonugugig.pdf
    • https://uploads.strikinglycdn.com/files/43fe0d05-e2e7-42fd-8a96-964f4d635618/is_an_executive_assistant_higher_than_a_manager.pdf
    • https://s3.amazonaws.com/patilawasu/foposijelaruzeradager.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011dae.bin
a1b651e8bb79b0f74e3bdc92b64ef8e6a047bc0f401c122e4f22bc9ddbdeabc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAE 4904 bytes
font_01_sfnt_off00012e4a.bin
cd282d200c35e403fbc18be222088d19967f8544c795591d647437a5a7e49483		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4A 11244 bytes
font_02_sfnt_off000154e7.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154E7 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.