Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cce2df07434c81c…

MALICIOUS

PDF

76.7 KB Created: 2021-03-22 05:46:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 614e438d108205c9196197493b70439e SHA-1: bb2c706212a1c506757a72ebcbb82f893af5d7ec SHA-256: 9cce2df07434c81c9ef27dc3d41f07a0ef402babda7318bf73b8e55bc96e13e7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs suggest the document's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=arbuckle+weather+report
    • http://good-production11.site/neruvax2056v.pdf
    • https://cdn.sqhk.co/vopunokapire/hbii5yx/stickman_gangster_crime_city_stickman_games.pdf
    • http://return-0.com/vasavopisiworuvavowodad6x7t.pdf
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5fe91bf35959b.pdf
    • https://cdn-cms.f-static.net/uploads/4419820/normal_5fdc311a9e0fb.pdf
    • https://zenavepofiwu.weebly.com/uploads/1/3/1/6/131607810/d2bc4d4dcf06a2.pdf
    • https://static.s123-cdn-static.com/uploads/4415544/normal_5ffd3969b29e4.pdf
    • https://cdn.sqhk.co/ramawuvade/bighhhd/sobovukefikidunivajiv.pdf
    • https://cdn.sqhk.co/wakewafo/kGiijaT/sibijew.pdf
    • https://cdn.sqhk.co/mogudekusab/gHZeji6/63331637035.pdf
    • https://fewupebotugap.weebly.com/uploads/1/3/0/7/130739906/tupokuvime.pdf
    • https://cs-online.club/rating/search/56290ee264f5a5d5a9885c7ade
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/legobegutulo/bishop_s_hatfield_sixth_form.pdf
    • https://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_0775b2bc8665443b8fe12b11647dc243.pdf?index=true
    • https://bbaef297-c986-4b42-acb3-0fd65605e280.filesusr.com/ugd/e9fc71_0571d513beab47b5953f8ff12ce316ac.pdf?index=true
    • https://s3.amazonaws.com/gapuruxumeg/69654432099.pdf
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_6538224b0acc4de0baf64f80317c0dd9.pdf?index=true
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_81927d7492fa4a9099281d584c9826ad.pdf?index=true
    • https://s3.amazonaws.com/bupijila/finder_s_fee_agreement_percentage_template.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_off0000e168.bin
5856721566203092021907156bff33c9fcf4876183e2cd8a22114b5b8210f6ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE168 4856 bytes
font_01_sfnt_off0000f20c.bin
f19df50128e40f02180b362234da6d4ef0227ae2271052d2c35f87e1498f69d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 10848 bytes
font_02_sfnt_off0001175a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1175A 4324 bytes

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