Malicious PDF — malware analysis report

Static analysis result for SHA-256 c333fb846f969307…

MALICIOUS

PDF

107.7 KB Created: 2021-04-14 23:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f078899c1f066ebca5d53fe3e7db57bb SHA-1: 5d0e1924f8ba9b7bce7435a82d3ace66a175a0b8 SHA-256: c333fb846f96930726c9438ca060c0388cc2e0bdfb1aad33c77c6ab9ab73b053
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users through a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=starbucks+rules+covid+uk
    • https://seporarutigofu.weebly.com/uploads/1/3/2/7/132741198/920477.pdf
    • http://xtrading.buzz/test_power_supply_without_pc60awj.pdf
    • http://xegazinijitup.mywebcommunity.org/west_bend_bread_machine_recipe.pdf
    • https://cdn-cms.f-static.net/uploads/4531523/normal_604cdde029c3e.pdf
    • https://vubufixul.weebly.com/uploads/1/3/4/7/134708570/2096785.pdf
    • https://static.s123-cdn-static.com/uploads/4422134/normal_5ff4c9bfb93ad.pdf
    • http://ponemofetu.scienceontheweb.net/ameda_breast_pump_manual.pdf
    • http://harkateine.fun/english_speaking_guide_tokyoy4djl.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://jarisudowapebi.sportsontheweb.net/8th_grade_science_worksheets_with_answer_key.pdf
    • http://kinerexasuxemo.getenjoyment.net/il_canzoniere_da_spiaggia.pdf
    • https://cdn-cms.f-static.net/uploads/4450625/normal_6026909834bac.pdf
    • http://biomaniks.website/adobe_premiere_rush_free_download_for_pc5bcg9.pdf
    • http://kijekidajefi.getenjoyment.net/az_203_study_guide.pdf
    • http://juniwasobevi.22web.org/pathfinder_template_holy.pdf
    • https://cdn-cms.f-static.net/uploads/4371799/normal_6027327eeb77d.pdf
    • http://tinonijo.iblogger.org/bizukaguzamapokasoge.pdf
    • https://viwoxinuzozaxa.weebly.com/uploads/1/3/1/6/131636825/vabavekugo.pdf
    • https://kuwevezutasozif.weebly.com/uploads/1/3/0/9/130969868/f18ef05ad3d.pdf
    • http://grusha.space/buzarakixazom1ehwo.pdf
    • https://cdn-cms.f-static.net/uploads/4469828/normal_604d978c1890d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nodetuxapabara/best_android_phone_pedometer_app.pdf
    • http://tojodoto.rf.gd/modonanupijonugit.pdf
    • https://s3.amazonaws.com/setikizo/mopobuduxonolefesupi.pdf
    • https://s3.amazonaws.com/minaxigevani/60396180776.pdf
    • https://s3.amazonaws.com/vinejivunitego/10460493385.pdf
    • https://s3.amazonaws.com/wofaxil/lewogutili.pdf
    • http://bugutanokunaliv.rf.gd/sustentabilidade_responsabilidade_social_e_meio_ambiente_livro.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000151c1.bin
a5447c1ddd818137bac0b2e4a0f79ecdd3a53a5829625fef87988c65d29acffd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151C1 5300 bytes
font_01_sfnt_off000163d9.bin
3a7e52efa3ddf021a873b0bdc697e6889fd9c0202ff10ddcf48eb25b85ca8d7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163D9 11540 bytes
font_02_sfnt_off00018b79.bin
844fb27054059bbe8e24107f7623dfc8b3714af0429cc888d8296577745ef093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18B79 16208 bytes

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