Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec29c39b8f6dd29…

MALICIOUS

PDF

85.5 KB Created: 2021-03-02 20:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 266ddc70fc3cd5a1c3887f627bac6dfe SHA-1: ed9743ebfab6b45be5988286bd2b71df9db5edd1 SHA-256: 1ec29c39b8f6dd2905adb13670dbd04b510995061e6e66045670848c38e2d8ab
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links pointing to disposable domains and known malicious redirectors, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=barnett+vortex+youth+compound+bow+arrows In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409409/normal_5fd90503af5c5.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/ziwanezomonuxug.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/femejunosumiwo.pdfIn PDF document text
    • http://899themes-demo.ru/jijasopedokimewq9q3.pdfIn PDF document text
    • http://gizigevom.mygamesonline.org/59354875250.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/can_you_track_priority_mail_international.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423772/normal_602501c19a422.pdfIn PDF document text
    • http://persequenteamsohbet.com/fubilazv2a0v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421058/normal_5ff66e8d3f47d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_602509cb8c303.pdfIn PDF document text
    • http://ighelpcenter.xyz/88769827380rzt0q.pdfIn PDF document text
    • http://limaxinsto.xyz/el_arte_de_la_guerra_maquiavelovaajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kufazete/diapositivas_historia_de_la_iglesia_cristiana.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/marozaviwarebosoga.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/cp_plus_app_apk.pdfIn PDF document text
    • http://xutenujute.myartsonline.com/best_way_to_shift_18_speed_transmission.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7D 5624 bytes
SHA-256: 08f7183498fabc770140829d945ec29a9c28b5a6e19fe5710d641f8b210e3e50
font_01_sfnt_off00010d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D75 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00011603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11603 10528 bytes
SHA-256: 9cc5685cd7f5fe549385e56fa8d7572ffc4cb4079ff5ad9717836b4b439e1c42
font_03_sfnt_off000139d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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