Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3c0e287aeb2aac…

MALICIOUS

PDF

141.3 KB Created: 2021-01-21 02:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d2a8530aa61fb8b234727c3b9d179fe SHA-1: d2489ad139ad030242fd5122ee04fcc6c714117d SHA-256: 0d3c0e287aeb2aac4a733fe23cc0f237e8033141c2d0e27924d1b659a91ce46f
134 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm, suggesting it's designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the PDF heuristics point towards a phishing or malware distribution attempt, possibly leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffset.ru/aws?utm_term=baahubali+2+movie++telugu
    • https://retizobokeli.weebly.com/uploads/1/3/1/0/131070240/pelofaril.pdf
    • https://cdn.sqhk.co/wivodojeg/hhgjbjW/55365710835.pdf
    • https://cdn-cms.f-static.net/uploads/4465259/normal_5fa8856663b3f.pdf
    • https://cdn.sqhk.co/tororukiwuri/B6iciji/who_will_escape_interactive_story_games_online.pdf
    • https://site-1168510.mozfiles.com/files/1168510/ruxiligese.pdf
    • https://site-1176370.mozfiles.com/files/1176370/operant_conditioning_reinforcement_vs_punishment_worksheet.pdf
    • http://novedexezenel.66ghz.com/38323792577.pdf
    • https://site-1168244.mozfiles.com/files/1168244/functionalist_perspective_on_education_sociology.pdf
    • https://site-1175914.mozfiles.com/files/1175914/98755083181.pdf
    • https://site-1249333.mozfiles.com/files/1249333/dejulipamivalumof.pdf
    • https://site-1191779.mozfiles.com/files/1191779/84816331752.pdf
    • https://nuwofukejixi.weebly.com/uploads/1/3/1/4/131437867/fizew-zejerimajalomoj.pdf
    • https://cdn.sqhk.co/zetikitor/icjbFig/62915382063.pdf
    • https://site-1172039.mozfiles.com/files/1172039/46323172187.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bigerubuseke.rf.gd/employee_personal_improvement_plan_template.pdf
    • http://fisuzes.epizy.com/afib_guidelines_acc.pdf
    • http://vugapadilubokis.epizy.com/82034684674.pdf
    • http://nekaxikafixof.epizy.com/zejigiw.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_off0001ca9a.bin
91bb61b95f2cf945517c11f4db93274f54870bc7851e7b1dad6707e8019e7566		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA9A 10612 bytes
font_01_sfnt_off0001edb2.bin
7ad27c666573d9a81435435f379285a3348ee93d8b3134fcad017b03cf4db8b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EDB2 5208 bytes
font_02_sfnt_off0001ff51.bin
9e2b914e32b59cdfda7868db517a4f8c4b4d7f21dd1d288897dee9d399668e30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF51 11676 bytes

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