Malicious PDF — malware analysis report

Static analysis result for SHA-256 65985e0d07c8de9d…

MALICIOUS

PDF

79.1 KB Created: 2021-04-04 10:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12921d1dccacfa23fcd9dcd904c7d4a0 SHA-1: 6bca39f12b3c4dbdbf2f7b940a07d09fc9b6f90d SHA-256: 65985e0d07c8de9d14986916cddcebcd1208bae1f8169cf93a7d4ce323cd600a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, with at least two pointing to suspicious domains ('botokaw.ru' and 'pexukakadom.22web.org'), suggesting it functions as a lure to phishing or malware distribution sites. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports its role in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=how+to+learn+english+grammar+step+by+step
    • http://pexukakadom.22web.org/benekumidipire.pdf
    • https://cdn.sqhk.co/datisafapuv/n5OvjdS/george_washington_university_social_intelligence_test.pdf
    • http://sumodena.getenjoyment.net/obstructive_uropathy_pathophysiology.pdf
    • https://cdn-cms.f-static.net/uploads/4461250/normal_60196d6a98a71.pdf
    • https://cdn-cms.f-static.net/uploads/4381347/normal_6033a1e9115c3.pdf
    • https://cdn-cms.f-static.net/uploads/4446264/normal_60445decc6721.pdf
    • https://cdn.sqhk.co/sawowudin/f2fijjf/63492745032.pdf
    • http://zopokujejisolan.getenjoyment.net/tomijuxegezivakeroboxin.pdf
    • https://cdn.sqhk.co/nemisova/nia0zgf/gesavakorazuwagu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d397443b-80d0-4e74-967c-4ce830ee3754.filesusr.com/ugd/0a76f0_fa62b13c1f8649739e65b94875a8422a.pdf?index=true
    • https://bed2d873-735b-46bb-a8a3-264d0455df4e.filesusr.com/ugd/03ede2_5680294c15b244ddadec816eb48d353c.pdf?index=true
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_c133831aa2fa446e921e7387a330721b.pdf?index=true
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_340092364e91468885aede2b1d43df35.pdf?index=true
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_17ef6f60c0304cf8b8defd5b119462d7.pdf?index=true
    • https://b32e410f-f365-4205-840f-53103702c783.filesusr.com/ugd/51ece5_ccecfc3c78cc4f348c29a5b71595230f.pdf?index=true
    • http://ferovugosewago.epizy.com/xuxevopawab.pdf
    • http://dawozisi.rf.gd/empirical_mode_decomposition.pdf
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_064f8e52330d4193ac4333b5d95d7aa8.pdf?index=true
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_20e7a607ffb74f8097689e99ece2cca0.pdf?index=true
    • 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_off0000ea72.bin
96c228b852c0c81be2a1110f5130f0baaaac98b8a86d93911c875e3f35d96c40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA72 5316 bytes
font_01_sfnt_off0000fc63.bin
72f99ef32ad1720ce37ce4e4ffc05a144461e8df2dc5ee3e56b1e28893c93edb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC63 10760 bytes
font_02_sfnt_off000120d3.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120D3 4324 bytes

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