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) First seen: 2026-06-04
MD5: f078899c1f066ebca5d53fe3e7db57bb SHA-1: 5d0e1924f8ba9b7bce7435a82d3ace66a175a0b8 SHA-256: c333fb846f96930726c9438ca060c0388cc2e0bdfb1aad33c77c6ab9ab73b053
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable domains and identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000151c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151C1 5300 bytes
SHA-256: a5447c1ddd818137bac0b2e4a0f79ecdd3a53a5829625fef87988c65d29acffd
font_01_sfnt_off000163d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163D9 11540 bytes
SHA-256: 3a7e52efa3ddf021a873b0bdc697e6889fd9c0202ff10ddcf48eb25b85ca8d7f
font_02_sfnt_off00018b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B79 16208 bytes
SHA-256: 844fb27054059bbe8e24107f7623dfc8b3714af0429cc888d8296577745ef093