Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbbb77e352a94a4…

MALICIOUS

PDF

80.7 KB Created: 2021-03-21 05:42:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40eb98219d59592c605d6ada68c281ea SHA-1: 520154eb0df60d4748f982ce75917283c7eba2a5 SHA-256: afbbb77e352a94a4eedc962fe016f7d499ebd6efa3fffed4d65da9ac060cb413
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The PDF contains a large number of external links, suggesting a link farm designed to redirect users to malicious sites, likely for downloading malware. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/wix?keyword=drastic+ds+emulator+apk+download+english
    • https://lafajadisevo.weebly.com/uploads/1/3/1/4/131454770/7475c5919.pdf
    • https://felipivi.weebly.com/uploads/1/3/1/8/131856333/11ad8b744562.pdf
    • https://zuxevuzefadum.weebly.com/uploads/1/3/0/7/130775429/c3ab8.pdf
    • https://timifuxi.weebly.com/uploads/1/3/4/6/134676324/7888942.pdf
    • https://gatakuluva.weebly.com/uploads/1/3/1/8/131856326/nojatamakomugiz-jopafavup.pdf
    • https://kapuwibipu.weebly.com/uploads/1/3/0/9/130969563/rejuminirus.pdf
    • http://portkamesto.site/552450642605iup6.pdf
    • https://lebotisoko.weebly.com/uploads/1/3/4/5/134597635/509849.pdf
    • http://flebolog24.com/cornerstones_of_cost_management_3rd_editionsdaec.pdf
    • https://tezilejesitox.weebly.com/uploads/1/3/1/1/131163634/jorewaloja.pdf
    • http://50offshop.pro/rv_toilet_seal_lubricant4966u.pdf
    • https://matixibufi.weebly.com/uploads/1/3/0/8/130873880/97d6ac15c.pdf
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/tomebo.pdf
    • https://lewanodeb.weebly.com/uploads/1/3/4/8/134885095/jolomafijeni-pakekoti-farugerosa-mulolazer.pdf
    • https://kawuruli.weebly.com/uploads/1/3/0/8/130814241/e463cbf404.pdf
    • http://nadahul.ru/56784031569c16fg.pdf
    • https://tabawowap.weebly.com/uploads/1/3/4/5/134599755/1747352.pdf
    • http://vaxuserinux.22web.org/engineering_drawing_notes_for_alp.pdf
    • https://mogopefisumiba.weebly.com/uploads/1/3/5/2/135295831/5017002.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wiwowefitupek.epizy.com/is_monsters_university_a_sequel.pdf
    • https://f16fa5c1-8556-4bba-8f86-04d9c108beb0.filesusr.com/ugd/2c3d75_c46132b1a0eb4ea2bc3e2683d9f2de72.pdf?index=true
    • http://gepuwuvezu.epizy.com/watch_the_handmaids_tale_free_online_season_1.pdf
    • https://9cc02d22-446e-415d-9686-6e49aadcb3b3.filesusr.com/ugd/aa6a08_7559f14c2c2847c688326e5b1409a36f.pdf?index=true
    • https://0f7a2101-273c-4f7f-b1fd-079d1ad923c1.filesusr.com/ugd/a7ea6f_cf06525562514f4e9637067ce0e8014e.pdf?index=true
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_4e63e3e5ed9a42fd86fce5852a8dc9e9.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f279.bin
5f4d9244f3f143446c7823a65f45ba35cf63b985b48533f838f8f4db709371ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF279 5644 bytes
font_01_sfnt_off0001059e.bin
c2e9f233734bfbda1f99572427eb9ca432b257ef2e16cd788d79e4f41a695d95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1059E 20880 bytes

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