Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a6ecbfae40baba…

MALICIOUS

PDF

73.3 KB Created: 2021-04-14 08:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b8150d14ebae999f094342f85c3b89c4 SHA-1: 22d846481dccce8b3408e5157aa461007bdc04c1 SHA-256: e9a6ecbfae40babab134e41d9fda3354126e1922133449351169576622b89936
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a search query related to Logitech keyboards. 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 heuristic firings suggest the document is designed to lead the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/strik?utm_term=logitech+bluetooth+keyboard+pairing+mk710 In PDF document text
    • http://heartcenteredequestrian.com/film_basara_season_4_sub_indo5xafj.pdfIn PDF document text
    • http://avto-trokot.xyz/neato_botvac_connected_manualeout4.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/ggj1Egd/luxor_pyramid_deluxe_room.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_5fe64880984fd.pdfIn PDF document text
    • http://artyom.guru/bed_elevation_cad_blockpr4rn.pdfIn PDF document text
    • http://zyzycheat8.xyz/31564757807lw1d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472768/normal_5fc95c44536b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457000/normal_5ff6529213979.pdfIn PDF document text
    • https://cdn.sqhk.co/tedubifo/CX4jelh/driving_school_simulator_2016_pc_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476578/normal_605285e5466dd.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/hihjzhb/zombie_world_war_game.pdfIn PDF document text
    • http://instahelpforbusiness.com/negibmnrj1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/16611772769.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/38006631966.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/form_action_in_submit_button.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/82384764124.pdfIn PDF document text
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_12ba6c01aad04fe2a327a420ed07e0af.pdf?index=trueIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_a23a86f231ae4d1f8c0661e83ac0ed0b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxorojero/biximapenuxefuwaleliromo.pdfIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_d39f60f44ceb4b0782f893c507abadea.pdf?index=trueIn PDF document text
    • https://b2bd4247-5771-4f9a-9f3f-b46500bff287.filesusr.com/ugd/f41bfe_94975217f1cf488d89f004f2fa660b91.pdf?index=trueIn 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_off0000dc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC50 5828 bytes
SHA-256: 6133a9e60446d2d7bd5f742fc5ae4998c4a4fc7fdb9f3ec102246f5af8a34d1b
font_01_sfnt_off0000f013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF013 10988 bytes
SHA-256: 2b9d07429700f6ecb644de4dd12051a269ebccd2fbad87ad5fb8c4e57adadf52

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