Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec0097365d2037cc…

MALICIOUS

PDF

68.1 KB Created: 2021-03-24 11:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5cfa5b29e0a94be74ea5b3d02da9b9f4 SHA-1: 03b1cbe1f91fba5856d9901cf7f4a616a9b13736 SHA-256: ec0097365d2037cc13080cc31a5b0ee3e63ffdb4f40632952e4703e0b4472c18
146 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The 'SE_CALLBACK_LURE' heuristic specifically indicates a callback phishing or tech-support scam pattern, urging the user to make a phone call. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the embedded URLs to host malicious content or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/award?keyword=unt+ba+biology+degree+plan+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382004/normal_5fc5be3ebf3e8.pdfIn PDF document text
    • https://bojibelatos.weebly.com/uploads/1/3/4/0/134040608/5006581.pdfIn PDF document text
    • http://balewezekowesab.iblogger.org/likose.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/hgi3pie/78897197796.pdfIn PDF document text
    • https://buxipowuno.weebly.com/uploads/1/3/4/3/134353207/vevode.pdfIn PDF document text
    • http://tivaxamikesu.iblogger.org/what_should_multimeter_read_for_continuity.pdfIn PDF document text
    • https://magijomolalol.weebly.com/uploads/1/3/1/4/131437319/vobobakigovereweb.pdfIn PDF document text
    • http://sewakasatixori.medianewsonline.com/86188578462.pdfIn PDF document text
    • https://cdn.sqhk.co/linaxezo/idghiLZ/the_new_york_times_front_page.pdfIn PDF document text
    • https://cdn.sqhk.co/mojesoje/geJlMIF/free_clock_in_clock_out_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499299/normal_5ff9068f96f8d.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/6142027.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/4371185945.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/fjiNgfE/7281734591.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/ahmadou_ahidjo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://seropurubok.epizy.com/analisis_e_interpretacion_de_estados_financieros_libro.pdfIn PDF document text
    • http://wowekujefabog.epizy.com/ebook_pinho_calistenia_gratis.pdfIn PDF document text
    • http://wajiletum.epizy.com/59683482395.pdfIn PDF document text
    • http://rofexivagonipuz.rf.gd/cloud_atlas_book_avatar_movie_based_on.pdfIn PDF document text
    • http://digopepu.epizy.com/web_page_to_firefox_extension.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_off0000ccb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB9 5264 bytes
SHA-256: 1d9c56f75139712bcf03974037c50d4e9ad69b08b3c84137c58634b6bb49766b
font_01_sfnt_off0000deb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB3 10760 bytes
SHA-256: cbaf332de48ec25c4004cd6b21358e9607d8f81dd5ae953fe8a55131eb04aa7c

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