Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b0c7f4cd6b05fa…

MALICIOUS

PDF

83.5 KB Created: 2021-03-12 08:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5ecd7fba106da5028bfce6080fb28d2e SHA-1: 920d1fbf3759462eb6d0aab4a07682045a368233 SHA-256: 04b0c7f4cd6b05fa0c98917adcd52e4a72f1fd65a9f7eb71899a9eea81172fa5
134 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one specifically pointing to a suspicious domain ('mezovuduw.ru') that is likely part of a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 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.
  • 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://mezovuduw.ru/wix?keyword=watch+tu+sooraj+main+saanjh+piyaji PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491723/normal_6014c436b9494.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/BIjcOJa/black_rifle_coffee_merch.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/new_sat_math_prep_book.pdfIn PDF document text
    • https://cdn.sqhk.co/niwexifa/iaKeHa1/translate_chinese_characters_to_english_picture.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426695/normal_6025060345834.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/motorola_hs850_bluetooth_headset_charger.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/mary_poppins_cast_2019_imdb.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/dabofedokofusevif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470821/normal_5fc7f777d3dea.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/83941293905.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/ijma8ja/alien_galaxy_shooter_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/disanefamu/7ggtDwh/35785366444.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/gejaieD/2019_polaris_550_indy_adventure_155_es.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412415/normal_5ff0f8385c1ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_601b3a42882ca.pdfIn PDF document text
    • http://bavimobuxadu.medianewsonline.com/blender_fluid_tutorial_2.82.pdfIn PDF document text
    • https://cdn.sqhk.co/vidujubotaf/9hahdjg/pekiduwozozudixaka.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/hib1jbb/16397368329.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea9b7d7a-4e4d-4145-a7af-ee46342b1532/apple_beats_solo_pro_colors.pdfIn PDF document text
    • http://fetekovabu.onlinewebshop.net/galaxy_a10e_charger_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2474b48e-e905-4d3a-9b2d-4ae111137e19/ruvivefotimejawimedukuz.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/90741293456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72fdbb1c-91fa-4289-90b3-85518c4cc1a7/lupomuxirulasorutufup.pdfIn PDF document text
    • http://muliwavanebebo.onlinewebshop.net/the_5th_wave_2_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f4ba37-8118-42ea-aeda-201b0b1b5a35/49188552715.pdfIn PDF document text
    • http://xiwexuxe.atwebpages.com/fourier_heat_conduction_equation.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D9 5332 bytes
SHA-256: 5c30a6fdabce066ddf4039f63d5b5a295d68348843f00e1f6a41b568a6d77168
font_01_sfnt_off00010be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE5 15800 bytes
SHA-256: b3e61f0743313a11d9074648c01ba6a38ba62511ce3b0c724db5a07ff8804e96