Malicious PDF — malware analysis report

Static analysis result for SHA-256 a696fde050ffe782…

MALICIOUS

PDF

82.2 KB Created: 2021-03-24 02:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b73a360d2a813a8a97f575591f69ae89 SHA-1: 2b7d4a08e6f4a4e340dd6eb83931fb2614c2a8aa SHA-256: a696fde050ffe782b90352d4d667e922302b17865ad009cdf1976199f91d2971
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external websites, many of which are hosted on disposable domains. The document body, though heavily obfuscated, appears to be a lure related to religious text, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=what+are+the+four+types+of+writing+in+the+old+testament PDF link annotation
    • https://vowizata.weebly.com/uploads/1/3/1/8/131856430/4370959.pdfIn PDF document text
    • https://fawibilewitowo.weebly.com/uploads/1/3/4/5/134585577/navipokiwivev_sexop_suzalam_pugironilod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366395/normal_5ff5ef3d3d9ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422385/normal_5fcb23cf1ab12.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/futagun.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/sanedixovejedazipijun.pdfIn PDF document text
    • https://sojexima.weebly.com/uploads/1/3/4/5/134584898/6115413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382407/normal_60113b0b69b22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450046/normal_601348b359d86.pdfIn PDF document text
    • https://mopotiwifatuge.weebly.com/uploads/1/3/0/8/130813373/fefiririlenusugipide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491410/normal_5fc9996804db8.pdfIn PDF document text
    • https://zitadinenere.weebly.com/uploads/1/3/1/8/131871439/6084444.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/catecismo_igreja_catlica.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
    • http://jemileti.atwebpages.com/528033770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49065802-eec2-44d2-8017-fefd09c99bf1/catia_learning_book.pdfIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_8dd9dc79ff004ca29b44f8c866605981.pdf?index=trueIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_fae2cb9cd6a6489a87ca4bc44f84444d.pdf?index=trueIn PDF document text
    • http://gixejemazob.myartsonline.com/seamless_book.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/nisizutuboxapozupulusug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd879635-219e-47c7-997e-b77b80d7495e/pretty_little_liars_season_3_episode_12_toby_and_spencer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c437e56-cbb9-4bc0-8695-53b045ed5889/att_cordless_phone_answering_machine_not_working.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_off0000f3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BB 5544 bytes
SHA-256: c2981c0c1eaad782f653813103b5950c76ff717d3b57a04c17faa09cf0da0d52
font_01_sfnt_off0001068f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068F 11188 bytes
SHA-256: cf6dba5d27a2fba8bd95ddaea5309ecc2ce0ddc2cf24978b3b932015c3024e02
font_02_sfnt_off00012c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C88 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230