Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d494db735f59066…

MALICIOUS

PDF

86.0 KB Created: 2021-03-14 03:56:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0fbcd728b1f85cfeca7c20104a5513e0 SHA-1: dc0cf27a2c195f37151f5c93341cbfc2900805d0 SHA-256: 4d494db735f590667ae4806d3a3fe5d9cf2ef9fdb19348a73cc75b8c4f525e4f
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a phishing lure by ClamAV and ML classifiers. The document body, though heavily obfuscated, contains text related to a search query, suggesting a phishing pretext. No scripts were extracted, but the presence of external URIs and the nature of the heuristics indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://soxebez.ru/strik?utm_term=how+much+is+a+huebsch+washer PDF link annotation
    • http://kugumexifemiwob.22web.org/cronica_de_una_muerte_anunciada_personajes_y_su_funcion.pdfIn PDF document text
    • http://meblik.su/aloha_breeze_tower_fan_remote_control_replacement14uk4.pdfIn PDF document text
    • http://wexoxunesixu.iblogger.org/buwijalasirezi.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/61488997171.pdfIn PDF document text
    • http://lokotahas.ru/what_is_a_pmi_project_manager9xu3m.pdfIn PDF document text
    • http://momarivido.mypressonline.com/pelibewojadibobefexasax.pdfIn PDF document text
    • http://jawigonoputumun.iblogger.org/amapiano_kokota_mp4.pdfIn PDF document text
    • http://reduslimitalia-official.site/5078245026u5zwh.pdfIn PDF document text
    • http://tubudemawaxoki.iblogger.org/36892044148.pdfIn PDF document text
    • http://sehq.xyz/nanozejafexezisojetotig53kfn.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/garorowa/bapokifidilevexetuwenidi.pdfIn PDF document text
    • http://gusalixofunek.epizy.com/louisiana_handwritten_will_form.pdfIn PDF document text
    • http://diretivik.rf.gd/sepuxuwalawexitone.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/gurozasesofatatifogezux.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/data_management_job_description_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/4950529990.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/fawojejekixofava.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/einstein_field_equations.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_off000106ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CA 4896 bytes
SHA-256: 9e2e771bce2c65320b6b9ec3be469e48cf06c600514e2365dca53693afbe2e97
font_01_sfnt_off00011772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11772 11024 bytes
SHA-256: c8a33639ac755795df3f85012293de97c216bd7c512a937d967df1c5d5efcb22
font_02_sfnt_off00013cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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