Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abf096f2ffa9b32…

MALICIOUS

PDF

81.4 KB Created: 2021-05-15 13:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8c826a2ab86a4d1071d497347f0d96b9 SHA-1: 2be25f2f056146f266a0536eec64368d915e38d8 SHA-256: 0abf096f2ffa9b3297c8d997713e121e930e186e0637d7af9cdb7e5de8d515eb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic of using many links on disposable domains, likely to obscure the true malicious destination. The primary malicious URL identified is https://xezojetit.ru/strik, which is presented as a search result.

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://xezojetit.ru/strik?utm_term=how+to+get+ge+washer+to+deep+fill PDF link annotation
    • https://fanamixaxa.weebly.com/uploads/1/3/4/0/134017579/804516.pdfIn PDF document text
    • http://goldstein.capital/infusion_nurses_society_standards_of_practicettufj.pdfIn PDF document text
    • http://gtomishebs.xyz/tazolufewexfo2q5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_606ded15beb25.pdfIn PDF document text
    • http://bumaga.bz/the_son_of_neptune_graphic_novel_online8gv02.pdfIn PDF document text
    • http://scoretdho.best/gesisivefubamixewefjs7cw.pdfIn PDF document text
    • https://xokaxoluxiw.weebly.com/uploads/1/3/5/9/135977396/21f5601963c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_6065968f64e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407318/normal_5fda7919e6fe3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376359/normal_5fc9af9233f99.pdfIn PDF document text
    • http://copyrightnotices-form.com/introduction_to_econometrics_updated_3rd_editionei1tj.pdfIn PDF document text
    • https://zevixaxilifudex.weebly.com/uploads/1/3/4/1/134131629/1938459.pdfIn PDF document text
    • http://huaweistoreukr.xyz/toastmaster_bread_maker_1188_manualyydnr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427077/normal_602aa8e5e070a.pdfIn PDF document text
    • https://musazulawikale.weebly.com/uploads/1/3/5/3/135305526/porusupizufevil-jivebotoso-fukit.pdfIn PDF document text
    • https://babujotiju.weebly.com/uploads/1/3/4/7/134751526/kokumubativ.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/61835881-1411-4a49-80af-7aa5e2b0bd34/zaporasefoxurep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f41d69-4840-47c5-bb33-5b280b0ca699/how_much_do_corporate_lawyers_earn_in_london.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a955b0-8c7c-446a-9973-3eb98a4d52f4/onetouch_verio_level_3_mid_control_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf1f670-e9a6-490e-a761-cc76abf3ab36/58685710190.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3C 5356 bytes
SHA-256: 10aed0cb9af256015ed52014512f66d20b77e17693e731f9869247b05d0c2257
font_01_sfnt_off00011182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11182 11416 bytes
SHA-256: 51a8ea36c523be55f87f3d083e2db5dd30bd3ecc2cac463aad8ba7fa5a155f42

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