Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ce362988e953ac…

MALICIOUS

PDF

73.8 KB Created: 2021-02-14 17:15:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7e5b9f6c0a9a9725fbf40c4fc50b239e SHA-1: 59d84005052952727c766b296ae9c166a507388a SHA-256: 24ce362988e953ac030d023738c8fa07157a561139d983c8e0875b0042bb5f39
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/wix?keyword=ova+file+type PDF link annotation
    • http://siondez.ru/space_warriors_trailer026h6.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/gihmiho/dodgers_all_time_strikeout_leaders.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425214/normal_5ff64f0c73aee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387566/normal_5fdb0f9ce1916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_6016772a2c52a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480756/normal_601136bf9ee43.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/Djiiigc/vanez.pdfIn PDF document text
    • http://bestita.space/vujonanovuzijowuw6bac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_600d48701e1f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_60116fbe64714.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/cheW8he/gomafofowemepuxivexafakux.pdfIn PDF document text
    • http://interstart.online/osmosis_and_diffusion_review_sheet_answers1m3dy.pdfIn PDF document text
    • http://thechambre.xyz/madixowubuxotehqwx4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vigukesege.epizy.com/femoral_canal_anatomy.pdfIn PDF document text
    • http://tutazex.rf.gd/44010285320.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_off0000e6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B7 4812 bytes
SHA-256: 3fdc6b9fa10cf94701e51be87beb8bc5a5d859a7aefc8679ffa3c74f1e980429
font_01_sfnt_off0000f740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF740 10372 bytes
SHA-256: ca9c4af04b46f00174813cac4595092602f9bac58aefb9c9e311e54de2b4e587

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