Malicious PDF — malware analysis report

Static analysis result for SHA-256 960d4ad499e3d961…

MALICIOUS

PDF

110.8 KB Created: 2021-05-08 20:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2c85ef5e8dad0f223af6d559cddfd00d SHA-1: 903fc8a690f6e2a11597b01f38a079f225d73bf9 SHA-256: 960d4ad499e3d961ab54d04cea1257c4a0972adbdcd259b5ce0affb28421ff66
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://soxebez.ru/strik?utm_term=pathfinder+kingmaker+stolen+lands+locations PDF link annotation
    • http://frontglass.xyz/job_interview_questions_and_answers_for_salesmankmzxc.pdfIn PDF document text
    • https://cdn.sqhk.co/govulasem/e1ieZii/monument_valley_weather_by_month.pdfIn PDF document text
    • https://wapubepedud.weebly.com/uploads/1/3/1/4/131455956/109abb4a.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/gghigZl/bazufotaburalobufowiku.pdfIn PDF document text
    • https://rewiwuzaziba.weebly.com/uploads/1/3/5/9/135959403/5501048.pdfIn PDF document text
    • http://wuxolikuxa.22web.org/client_relationship_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/jnicNP0/packers_score_right_now.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabure/gjh4Usm/woodcutting_guide_osrs_afk.pdfIn PDF document text
    • https://cdn.sqhk.co/tirazirevemu/6gg4m8u/informe_de_auditoria_informatica_definicion.pdfIn PDF document text
    • http://8bitbeardsco.com/song_of_solomon_quotes_about_identityjyekr.pdfIn PDF document text
    • https://kupifibadobibe.weebly.com/uploads/1/3/4/5/134512214/45a46f38cea.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/eCgihjS/mega_boy_caydanl_k_fiyatlar.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/sj5ihhh/fufijomu.pdfIn PDF document text
    • https://cdn.sqhk.co/dujovibipu/T9S0Nhb/texas_campground_map.pdfIn PDF document text
    • https://cdn.sqhk.co/daxegajok/jjjhxgc/93728631239.pdfIn PDF document text
    • https://cdn.sqhk.co/dokamaruxif/gjC5gcx/snapchat_login_problem_iphone.pdfIn PDF document text
    • https://dokakuzod.weebly.com/uploads/1/3/4/8/134884054/gisolebadi-witopizarorob-manowibo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_58855523d30d456bb25b6a6f1db62825.pdf?index=trueIn PDF document text
    • https://be8f41f0-9ddd-434d-ab6d-aa755a40b80d.filesusr.com/ugd/726d9c_0734661c03974208a2204150c6616912.pdf?index=trueIn PDF document text
    • http://ruvatarojamun.rf.gd/joxagagegekelika.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001670d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1670D 5288 bytes
SHA-256: 385e8eecdb94342ecc7bcd012fe46c90cfe6c6107853936ea6b9c20ee0562928
font_01_sfnt_off000178cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178CF 11628 bytes
SHA-256: 0daa5b9a38807be04b42be5f34c8f859b51004ce0ed2c15f6a9fc962ace3c3f4
font_02_sfnt_off00019f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F63 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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