Malicious PDF — malware analysis report

Static analysis result for SHA-256 b20ca218cddf132a…

MALICIOUS

PDF

94.2 KB Created: 2021-03-20 00:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2e91295652a900da54af506fc7422a2 SHA-1: bfa590249376f4fa43e5b31bcedc785c849f3633 SHA-256: b20ca218cddf132aae84866ebe50d04a6af372b3a55abad096d6d40ba55c71fc
156 Risk Score

Malware Insights

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

This PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results. One prominent URL, 'https://xezojetit.ru/wix?keyword=pathfinder+shadow+dancer+guide', suggests a lure to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://xezojetit.ru/wix?keyword=pathfinder+shadow+dancer+guide
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/nekuwaremevate.pdf
    • https://vapasunodisina.weebly.com/uploads/1/3/0/8/130873802/bbfefe1d1.pdf
    • https://cdn.sqhk.co/zixedagiro/iiilf8H/plants_vs_zombies_free_online_no_flash.pdf
    • https://cdn.sqhk.co/koditisalupe/gfhhKjg/average_cost_of_health_insurance_in_texas.pdf
    • https://static.s123-cdn-static.com/uploads/4454164/normal_5fed8e99b93df.pdf
    • https://cdn-cms.f-static.net/uploads/4370055/normal_601adcbddacbe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zaxawetawupo/carrier_air_conditioning_control_manual.pdf
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_ff5d81e991be477d9a7d6784481d183b.pdf?index=true
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_4b5c7c85d90340fea06feb3911d9d1ca.pdf?index=true
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_ea4707abb36b42ec9c624c6b5fcbbdae.pdf?index=true
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_8930b97c4c6a43b99b2b7f5654f3aceb.pdf?index=true
    • https://s3.amazonaws.com/tasufagijaremo/how_to_calculate_heat_exchanger_size.pdf
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_f80dcb7607e8416e919a9cca955577d8.pdf?index=true
    • https://s3.amazonaws.com/degagaziv/cotton_house_sheets.pdf
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_0ed3ffa5e3ca4ec49d3873f65d8d5ad1.pdf?index=true
    • https://s3.amazonaws.com/zozofufulolig/abundance_investment_performance.pdf
    • https://s3.amazonaws.com/getizar/potty_training_in_3_days_vs_oh_crap.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_off00012f93.bin
003710f22c9ca443debacdc726a5658e9fdd610e57f071c74948cf40f7e32ffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F93 5344 bytes
font_01_sfnt_off000141d1.bin
88c7f1dc5ec916bfdf2202473d88a2156f4d64a591da2a2a6e9c332fea415713		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141D1 11732 bytes

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