Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9c2607d3ec6c03…

MALICIOUS

PDF

81.5 KB Created: 2021-03-30 08:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1d73b2afd3dbdfe4298649196af160a SHA-1: b5bbd76765b2e939e1766981073588452b9cff81 SHA-256: ff9c2607d3ec6c03765e52a846a6af7f491ff2f3aded955b35f32084fbebd74d
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL `https://seumenha.ru/strik?utm_term=how+much+does+a+roku+stick+cost` suggests a phishing lure related to product costs. While no scripts were explicitly extracted, the PDF structure and external URI firings point towards a phishing campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=how+much+does+a+roku+stick+cost
    • http://zaroramo.22web.org/67556670942.pdf
    • http://lulodexov.scienceontheweb.net/reliability_centered_maintenance_book.pdf
    • https://piwetidij.weebly.com/uploads/1/3/2/3/132303123/tuvepewupuka_xaxipipis_ripozoke_faweji.pdf
    • http://copyright-central-media.com/huckleberry_finn_movie_1939o764k.pdf
    • https://cdn-cms.f-static.net/uploads/4387715/normal_5fd831af0f3c1.pdf
    • http://tibijuwubato.iblogger.org/34316481164.pdf
    • http://liwurivosopap.medianewsonline.com/libros_de_ortopedia_maxilar.pdf
    • https://xizenajagixofus.weebly.com/uploads/1/3/4/6/134657686/db7bbf93d51.pdf
    • https://static.s123-cdn-static.com/uploads/4447267/normal_5ff042ae379db.pdf
    • http://sepukolobu.sportsontheweb.net/pujuvifenesugafafagikuxid.pdf
    • https://bijafifevidajun.weebly.com/uploads/1/3/6/0/136051066/barul-rodixujeke.pdf
    • http://smirnoff-optic.com/waring_food_dehydrator_dhr30_manuall2wog.pdf
    • https://static.s123-cdn-static.com/uploads/4410030/normal_6004cfd06a2aa.pdf
    • https://fotofewoxa.weebly.com/uploads/1/3/4/8/134849098/genano.pdf
    • https://cdn-cms.f-static.net/uploads/4478134/normal_601d78a8e46bb.pdf
    • http://djami.ru/lagu_cinta_luar_biasa_andmesh_kamalengp9euq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mipeboro/bye_bye_blackbird_satb.pdf
    • https://s3.amazonaws.com/dapekufoxiraku/hamilton_beach_toaster_oven_turkey.pdf
    • http://fizufizobizud.epizy.com/why_tv_no_power.pdf
    • http://niwaraz.epizy.com/18900730678.pdf
    • https://s3.amazonaws.com/votubukaxogilix/diablo_3_darkening_of_tristram_guide.pdf
    • http://suginuzebaluwom.rf.gd/trainee_flight_simulator_maintenance_engineer_job_description.pdf
    • https://s3.amazonaws.com/xebuvuwov/19880788744.pdf
    • https://s3.amazonaws.com/bomupi/jijofadenunakuru.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010078.bin
50092b86f92a009edacc077deae9a173ae4979ead987811a74d940625abb14a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10078 5264 bytes
font_01_sfnt_off0001123c.bin
6fc4122a8b18b3d44ff329b22b03be1ffb8562f31a2f3703f1faf70a57767560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1123C 11312 bytes

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