Malicious PDF — malware analysis report

Static analysis result for SHA-256 8422b82e7aa875e9…

MALICIOUS

PDF

81.5 KB Created: 2021-03-04 18:29:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 05df8e0599fde7a9e1aef45b9f68d00a SHA-1: 29e60de5fe89e14e5a8a8cc0d817537097837a64 SHA-256: 8422b82e7aa875e9ae69df9e85e949431140b078e8703304b600493d7b0a1d06
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, and is flagged by ML classifiers and ClamAV as malicious. The embedded URL `https://jumiwimov.ru/123?utm_term=beats+solo+3+wireless+matte+black+review` suggests a lure related to product reviews, likely intended to trick users into visiting a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://jumiwimov.ru/123?utm_term=beats+solo+3+wireless+matte+black+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445866/normal_60013d4b1a9cb.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/wejovatusiwezipinn2txn.pdfIn PDF document text
    • http://cashtanks.fun/acute_diverticulitis_management_guidelinesuieqm.pdfIn PDF document text
    • http://zukirudon.mypressonline.com/95835888450.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/sanowozapoxoweloduxafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_602acec45fee3.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/how_much_does_a_firehouse_sub_franchise_cost.pdfIn PDF document text
    • http://hyipinvest.site/lokosupenujatokeric7nfr.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/casio_g-shock_ga-100-1a1dr_g270.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480142/normal_5fdffdd05333a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447258/normal_5ff21a0fb5a0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378848/normal_5fce9f6d3608b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_603e495214733.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477916/normal_5fdfccfb329cc.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://s3.amazonaws.com/bogeguva/brochure_template_presentation.pdfIn PDF document text
    • http://zotubune.myartsonline.com/adobe_audition_cc_midi_keyboard.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/mofenotujabuxomekivi.pdfIn PDF document text
    • http://vexolofifete.atwebpages.com/42947867209.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/93565047508.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/what_is_the_implication_of_ethics_in_health_and_physical_education.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_off0000ef96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF96 5196 bytes
SHA-256: 4edada7ff5c996ccd42f0515689390b3ae287eecbe461b38a57c6af59c91a9a1
font_01_sfnt_off00010154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 11584 bytes
SHA-256: 4dc46c6e91c0f3bccddd22cbcb6d480898bd2fff4be579a22814e26bf104d6f8
font_02_sfnt_off00012890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12890 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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