Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e1b73897410e8c…

MALICIOUS

PDF

76.4 KB Created: 2021-03-05 14:08:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 75daf4c498698e687f2188fc1194ec8c SHA-1: 389327478a58e00902f529df5fa7915c4e9a7bea SHA-256: 02e1b73897410e8cb1a6f068192ca0dd9e1f7febad45ddbbb15ac2cc229c4f8b
246 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics, including ML classification and ClamAV, and is specifically flagged for brand impersonation phishing, targeting Amazon credentials. It contains a mass of external links, many pointing to disposable hosting, suggesting a link farm designed to obscure the ultimate malicious destination. The primary malicious URL identified is a redirector leading to a PDF hosted on weebly.com, which is part of the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://palobakuk.weebly.com/uploads/1/3/4/5/134523632/zevunofoxarukoli.pdf.
  • 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://jumiwimov.ru/award?keyword=last+of+the+mohicans+free+online+streaming PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414701/normal_5fe081626a5de.pdfIn PDF document text
    • http://copyright-securityx.com/what_is_a_general_audience_in_writing0kyxh.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/gsJeULN/1316482467.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/iTkghhd/catan_universe_game_modes.pdfIn PDF document text
    • https://cdn.sqhk.co/lofakekaf/rifXgdH/servicenow_incident_soap_api.pdfIn PDF document text
    • http://levantegroup.net/coal_india_interim_dividend_2020_record_datenb4ut.pdfIn PDF document text
    • https://palobakuk.weebly.com/uploads/1/3/4/5/134523632/zevunofoxarukoli.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/tcgg4ij/47861131276.pdfIn PDF document text
    • https://xujeloza.weebly.com/uploads/1/3/4/0/134096435/dukosuwepa-sedoset-nosuva-xuzudadunoxikax.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/iaibigf/4230207800.pdfIn PDF document text
    • http://leree6.club/botiba093we.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480382/normal_5fd0317019f0b.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/thDhjie/football_manager_brazilian_team_names_list.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/g6jfpie/boom_learning_cards_login.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421473/normal_5ffa1a15c3d86.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nakanunelu.rf.gd/bow_making_template_free.pdfIn PDF document text
    • http://liwununigu.epizy.com/introduction_to_psychology_notes_ppt.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_off0000f01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01D 5236 bytes
SHA-256: 91495537bdfdc953b154f6bdbe22a6bc27c268cee0b5dd54d4883b7b70d4dbd5
font_01_sfnt_off000101c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C6 10080 bytes
SHA-256: 00ce8874b82b9f095c50b93d597ca7173f0038ed048dca58a415e4b23f1185c7

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