Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22571ece2fb312b…

MALICIOUS

PDF

79.9 KB Created: 2021-04-21 05:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 81642de88409683834c363acc23b7faa SHA-1: 116668126f586b82cdf6064d586999264f39318e SHA-256: d22571ece2fb312bcd842df95a78c2893f5806bf5835ca27e8b4979579396246
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple external links, with one specifically identified as a lure for remote support information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'SE_REMOTE_SUPPORT_CODE_LURE' suggests the document attempts to trick the user into providing remote access details, which is a common social engineering tactic.

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
  • Remote-support code/control handoff high SE_REMOTE_SUPPORT_CODE_LURE
    Document asks the user to share a remote-support code, connection ID, or allow control in the context of remote-access software
  • 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.
  • 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://jottigo.ru/strik?utm_term=schlage+keypad+lock+battery+keeps+dying PDF link annotation
    • https://cdn.sqhk.co/vekunego/gjjeha2/silimidoko.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/44853823778.pdfIn PDF document text
    • http://ruzamaji.getenjoyment.net/receptionist_self_evaluation_form.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/learning_python_o_reilly.pdfIn PDF document text
    • http://leomannapov.com/64274229674jrsrx.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/iihSijd/top_telemedicine_companies_2020.pdfIn PDF document text
    • http://akmurzina.com/manikoxiwiluvabuxizuwisbqwo5.pdfIn PDF document text
    • http://com-signto2.xyz/vemexesakipilokupumebulixqmmif.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/mariachi_trumpet_music.pdfIn PDF document text
    • http://memaberenux.scienceontheweb.net/49938601311.pdfIn PDF document text
    • http://viwoxavufonodu.22web.org/86372056378.pdfIn PDF document text
    • http://famixadip.22web.org/jakidewex.pdfIn PDF document text
    • http://all-host.site/lutaloamoso.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/xanunafojuloki/interview_questions_and_answers_for_accountant.pdfIn PDF document text
    • http://wofofuzumoju.rf.gd/appleyard_becoming_a_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/zivufawaluj.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/haier_5000_btu_air_conditioner.pdfIn PDF document text
    • http://pavapivujuv.rf.gd/90700425818.pdfIn PDF document text
    • http://roronusosewurul.epizy.com/electronic_cargo_tracking_system_zimbabwe.pdfIn PDF document text
    • http://bazogojuzularib.rf.gd/bags_groove_milt_jackson.pdfIn PDF document text
    • http://zitabuzujo.epizy.com/25714110479.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/android_studio_splash_screen_animation.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_off0000f9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A5 5744 bytes
SHA-256: ed4240394fcc8a115ac742304d827500591f4c1c28dddad684de0788cbc9b239
font_01_sfnt_off00010d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2D 10756 bytes
SHA-256: 9e69daebac70e49d48d950ceb86f29a130fe00f49863229f411db697e8c99128

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