Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a90f923a0489a8…

MALICIOUS

PDF

80.1 KB Created: 2021-03-17 04:20:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 486aa36b5d4d740369a3f94e85a8e3f9 SHA-1: 97381152fd163af7d15be92cefcc4319d998ba08 SHA-256: 96a90f923a0489a895d57f8db6de2bba274b77bb07459441b191a86a842a3cb2
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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://druttle.ru/award?keyword=auditing+process+pdf PDF link annotation
    • https://cdn.sqhk.co/tidelefuzin/jdoCjdx/jimisaragogakuxezanodoz.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvitatutuv/hiFifif/rabitibezisojomuraxe.pdfIn PDF document text
    • http://xovitixekewelom.scienceontheweb.net/estadisticas_de_trastornos_alimenticios_en_mexico_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetijesi/xghhhja/tags_for_videos_on_facebook.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/93803510684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461505/normal_601cb707d67a1.pdfIn PDF document text
    • http://logawedulukudan.mywebcommunity.org/wotiledezesivebamalazubo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528260/normal_5ff3816517f25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412181/normal_5fed911bd3649.pdfIn PDF document text
    • http://lisuzigerob.mygamesonline.org/mesaja.pdfIn PDF document text
    • http://jirenaxapibetig.scienceontheweb.net/world_war_z_game_crossplay_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuputid/DKVfijm/net_sociology_syllabus_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483623/normal_6027cdcec4e67.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/ejihcH5/best_black_friday_deals_online_canada.pdfIn PDF document text
    • http://rezanufeku.mygamesonline.org/tebepubibifatefilusejaxad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427284/normal_6013e89bee01c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474736/normal_600fabe903eb8.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/76566085424.pdfIn PDF document text
    • https://cdn.sqhk.co/tusenepobam/xiehieQ/ferazoxakivonimulu.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/22766454621.pdfIn PDF document text
    • https://cdn.sqhk.co/wefenosefob/aIMGQii/24797535333.pdfIn PDF document text
    • http://nekidifuton.medianewsonline.com/79415418898.pdfIn PDF document text
    • https://cdn.sqhk.co/topefebi/dggcgf3/tanks_a_lot_dive_charters.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446283/normal_5fcd1df7e22de.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://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_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 4952 bytes
SHA-256: 6850e96ef9fae621aa514a80cd2adf7c208f895b2ec7af34a66df4c7677dfb67
font_01_sfnt_off000101cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CB 10216 bytes
SHA-256: 9cdd4a3b5a6d0ae5b7ab2859944bd1914c490da32ebf8815dbe0eb53e821d95e
font_02_sfnt_off000124a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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