Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5a6b37d4e9722b…

MALICIOUS

PDF

118.1 KB Created: 2021-03-08 05:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8e82fddd0b661ede792f68895b700dbd SHA-1: 3b19294fc803088901b647096330b656ce88a4bf SHA-256: 8d5a6b37d4e9722bbc7cbd0229d74d6ecc3223cf97dd1497710c1ee4fb2d4c85
96 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru', which is likely a malicious domain used to host phishing content or further malware. The document body, though heavily obfuscated, appears to be a lure related to a popular media series, aiming to trick users into visiting the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://zajinet.ru/wix?keyword=wheel+of+time+series+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384851/normal_6010ae62d6160.pdfIn PDF document text
    • https://vemiturixawo.weebly.com/uploads/1/3/5/3/135399419/3045235.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490746/normal_5ff4f2503b0ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480423/normal_5ff48953b4c35.pdfIn PDF document text
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/rakelelumapejesowo.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/f0491e2ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475586/normal_5fdeeca2d7988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488804/normal_600dbf1d73870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412905/normal_60264cbd23a4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462694/normal_5ffbe64db4284.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/74399108792.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/jupaduv.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/bunefole_kumijupezibozu_limanalej_wilafexujovomof.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/nulidowugexeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401559/normal_5ff0b37e72c99.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/bevodunoxuwone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449788/normal_5ff787fdeeb79.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/3142ed0c-7b3a-4f14-b9d4-0c661524c381/najogevevikebororazot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a97c24b-5136-4ede-8803-f1c0557824ff/how_to_adjust_tension_on_nordictrack_elliptical.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9345363e-2c37-4649-9cb2-0c81618e42b0/citizen_u600_capacitor.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/jepesukoge.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/tres_metros_sobre_el_cielo_reparto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0790b3aa-d297-4276-b27b-544a212dd997/60890316670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b25cec7-aeec-4cfa-aa52-da835a57d199/libros_de_economia_y_finanzas_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/present_simple_and_continuous_exercises_easy.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/vozanafis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A0A 3088 bytes
SHA-256: 115cc8b05e3013395e4e3a1979ea793338b885fda349c2636085ef5f2d68be30
font_01_sfnt_off00019510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19510 5084 bytes
SHA-256: 083ce0ae6e38e27fc49f07a7992fa8d800ddc631d45fa3285fa679f4bca5aa58
font_02_sfnt_off0001a640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A640 10592 bytes
SHA-256: cf7fc68ada0e82564a73d3dba84f88e97ba097e9f803d5ec1470c92bd1cf953b

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