Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1327c50b656d9f7…

MALICIOUS

PDF

75.0 KB Created: 2021-04-08 23:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad395b72e3f3f7652f9651dd19007084 SHA-1: bf4b6d586b8952064fc128fc5a5fb232779dc571 SHA-256: a1327c50b656d9f783ac06da61736ff359540297dca9150642f86fd4ef5127a3
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 URL pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to printer network security, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/strik?utm_term=how+to+get+hp+printer+network+security+key
    • http://boribonabone.mypressonline.com/prevention_of_oppression_and_mismanagement.pdf
    • http://wonikugemozu.iblogger.org/how_do_i_know_which_weber_spirit_grill_i_have.pdf
    • http://yesstore.pro/hotstar_vip_app_apkap24c.pdf
    • http://mkr-olimp.info/pazitewalokowifizivumm2l1.pdf
    • http://cyberlife.store/coding_all_in_one_for_dummies_reviewziac0.pdf
    • http://dotixomovi.sportsontheweb.net/degilozarezukopuwe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f3d364ca-cba5-4572-b6bf-2a6bc41cc632/dekezazepiboxefiki.pdf
    • https://s3.amazonaws.com/gavapozalilup/62538694252.pdf
    • https://uploads.strikinglycdn.com/files/33898b1d-9a86-47d4-9a28-cb26b1e88934/how_to_calculate_mixing_ratio_of_paint.pdf
    • http://sipanokule.onlinewebshop.net/bonaxajap.pdf
    • https://s3.amazonaws.com/zurovajij/33258686145.pdf
    • https://uploads.strikinglycdn.com/files/9209add6-e7eb-495f-84bc-ee0339c6285f/benjamin_theses_on_the_philosophy_of_history.pdf
    • http://rumudojipa.epizy.com/what_instruments_are_used_in_folk.pdf
    • https://s3.amazonaws.com/safenalavojuwu/why_does_my_wireless_headset_keep_cutting_out_ps4.pdf
    • https://s3.amazonaws.com/wavunot/battlefield_vietnam_highly_compressed.pdf
    • https://uploads.strikinglycdn.com/files/30ffa013-28ee-447c-b0cf-24a858b4cb99/algebra_lineal_grossman_7_edicion_gratis.pdf
    • https://s3.amazonaws.com/jujadodedaruxix/23035222212.pdf
    • https://s3.amazonaws.com/robumuduluwise/the_atmosphere_an_introduction_to_meteorology_12th_edition.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_off0000e99d.bin
7fdb4a8769c09dfb4eb342b8d6c296a9dc8f78440b4ab27356efd4e4c09140da
pdf-font-stream PDF embedded font (sfnt) at offset 0xE99D 5172 bytes
font_01_sfnt_off0000fb56.bin
8050c7488dfda1424483148d4e636915276579b103b1b007a9a4e31c3cdc6a30
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB56 10240 bytes