Malicious PDF — malware analysis report

Static analysis result for SHA-256 6392534738c986ce…

MALICIOUS

PDF

70.9 KB Created: 2021-03-25 02:13:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a9c3441a18c98075a86175f714b6ad6 SHA-1: b94f8ac48b4571501458d61c1823d5d6ce5c824d SHA-256: 6392534738c986ce5585ad0a4e6a5f6d5ddf97f0a66a2134ef69e4b59a837ad1
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'nipisod.ru', which is likely used to host a phishing page or deliver a second-stage payload. The document body, though heavily corrupted, appears to reference 'Norton introduction to literature 12th edition', suggesting a lure to trick users into clicking the malicious link.

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://nipisod.ru/strik?utm_term=norton+introduction+to+literature+12th+edition
    • http://nupesupo.mypressonline.com/amistades_peligrosas_novela.pdf
    • http://macsk.space/57313075714802mb.pdf
    • http://medemukiduba.sportsontheweb.net/19569471142.pdf
    • https://wajuzetixageg.weebly.com/uploads/1/3/0/9/130969085/duzugodoza-kavojad.pdf
    • https://cdn.sqhk.co/purijiralug/ieYic4y/75584893221.pdf
    • https://cdn.sqhk.co/lanumakefu/UjajaXS/jeguzeka.pdf
    • http://fetedeju.mygamesonline.org/modern_high_end_valve_amplifiers.pdf
    • https://cdn.sqhk.co/mewuxedodi/ficEjip/jipaper.pdf
    • http://topchambre.xyz/fudarajuwileg.pdf
    • http://gnatural.space/chikoo_information_in_marathimowh4.pdf
    • https://cdn.sqhk.co/jagibuvat/hbGZjcw/make_it_perfect_level_156_voodoo.pdf
    • https://cdn.sqhk.co/pimepojuti/djaqhfO/betokaligisofa.pdf
    • http://nokojatagi.mywebcommunity.org/45997305480.pdf
    • http://liketime.fun/38034228101j0wld.pdf
    • http://fuvesozufinefi.medianewsonline.com/226580784.pdf
    • https://kupujusurigov.weebly.com/uploads/1/3/4/4/134471221/vogalun.pdf
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/c3050dd76e9a.pdf
    • http://dufigep.scienceontheweb.net/adobe_acrobat_reader_append.pdf
    • http://labiosdewonda.com/pedinawotogavllyc2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_68fc0b942b7f41fcbb0adc5b320d7a06.pdf?index=true
    • https://af502db9-4f40-408d-b39b-56fbefa00b60.filesusr.com/ugd/2d797c_9342f4e3df16475c82ce807f3f57ff78.pdf?index=true
    • https://e0529b0e-ffd4-46ae-8a9e-348c3aa8e3ae.filesusr.com/ugd/27320f_862bb48224b6425db79e87d75f011005.pdf?index=true
    • http://faxiruvud.myartsonline.com/30935288499.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_off0000d59e.bin
c0d71cc97987343c61919127919759eb4335feed01a826ae4853da9e7728dae8
pdf-font-stream PDF embedded font (sfnt) at offset 0xD59E 5004 bytes
font_01_sfnt_off0000e69f.bin
fece4633a6f8eaba8d419ae9046814e9a64754b6661c40fac14ac34ed97d8cef
pdf-font-stream PDF embedded font (sfnt) at offset 0xE69F 11764 bytes