Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf82e3582c1c3af…

MALICIOUS

PDF

76.7 KB Created: 2021-03-10 02:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 91f8923cb51abd19ce9fc0d6303daf6d SHA-1: 484a922e5a3f5d069fb2488ba86a1586e86422ac SHA-256: baf82e3582c1c3afda8f5f34ab17484e729c2cdb2493c2b9c4e07ea7489d1340
134 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick the user into clicking a link, which is further supported by the presence of numerous external URIs. The document body was unreadable, but the heuristics and URLs point to a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://botokaw.ru/strik?utm_term=advanced+d%2526d+rules+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460043/normal_600d97260e953.pdfIn PDF document text
    • http://crysety.xyz/mipobupaduwutojj8lxt.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/fihekhf/voice_memo_on_iphone_11.pdfIn PDF document text
    • http://prolac.ru/favofenudamurojizz03ay.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/best_myers_briggs_personality_test_online.pdfIn PDF document text
    • http://tenipimutav.mywebcommunity.org/78850122546.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462993/normal_5fdaf03dd6b18.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/what_does_social_norm_mean_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/4XC0Oje/dead_cells_update_barrels_of_fun.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/chbVche/faduxefekomanujonubol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490369/normal_5fd7d7503ea21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_6009da73f2dbc.pdfIn PDF document text
    • http://silvanozito.online/nijadupanomohb5q.pdfIn PDF document text
    • http://nuwetiveguvo.mypressonline.com/agile_model_driven_development.pdfIn PDF document text
    • http://onlinetyz.xyz/spelling_connections_grade_5_unit_9_answerstju3m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414156/normal_6011c5983d255.pdfIn PDF document text
    • https://cdn.sqhk.co/femokuxajuz/fZie9N4/ludo_the_king_of_dice_earning_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fikuvine/zizogipulazofona.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/acrobat_reader_xi_standard.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/64564243054.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/23216346433.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/squirtle_shiny_form.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_off0000f120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF120 4676 bytes
SHA-256: 14df0bb7697f7551b399dad8f2ea316c96d16fbd90c47479688b609988c1d3d0
font_01_sfnt_off00010125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10125 10680 bytes
SHA-256: 7924304a78884a9c2ed007448868c6d1d12f58254d655e70cb2bcb83b626bdfa

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