Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe3bfdc56292de5…

MALICIOUS

PDF

166.1 KB Created: 2021-06-02 14:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e823dc487851c14d774a4e80c23a270a SHA-1: f8216df392666ae7f9bbd10cd787828b61e9518e SHA-256: 6fe3bfdc56292de5abff22db6deee14940940ba942519652334f82f6387c33ec
226 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by multiple heuristics, including ML classification and ClamAV, indicating it's a phishing lure. It contains numerous external URLs, many of which are associated with disposable hosting and redirectors, suggesting an attempt to obscure the final malicious destination. The presence of a 'Password-protected archive handoff' heuristic strongly implies the document's purpose is to trick the user into downloading an encrypted payload, likely for credential phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://kutinimi.weebly.com/uploads/1/3/4/6/134608846/73fedce52131d.pdf.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://cructi.ru/pbw?utm_term=aws+csa+study+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409248/normal_6051e829ce619.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443598/normal_5fcce9b3bda1b.pdfIn PDF document text
    • https://kutinimi.weebly.com/uploads/1/3/4/6/134608846/73fedce52131d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475562/normal_5ffd820328534.pdfIn PDF document text
    • https://jadotonevuwupu.weebly.com/uploads/1/3/1/4/131407011/bokojurolaja-zizizana-bobiwiwor.pdfIn PDF document text
    • https://pudufanosi.weebly.com/uploads/1/3/4/3/134324904/676fb3531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_60296d4824e13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_5fd1a749e9329.pdfIn PDF document text
    • https://wafodefa.weebly.com/uploads/1/3/4/4/134480145/kifotuvasamuviz.pdfIn PDF document text
    • https://nuzoligul.weebly.com/uploads/1/3/3/9/133997434/2328931.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485580/normal_6023f449b64af.pdfIn PDF document text
    • https://daliroxemonove.weebly.com/uploads/1/3/0/7/130775241/9571803.pdfIn PDF document text
    • https://dugizixenopiloj.weebly.com/uploads/1/3/4/4/134457585/0df460.pdfIn PDF document text
    • https://lefokanu.weebly.com/uploads/1/3/4/3/134377273/4163587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_5fe8cdde8f722.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://didaneguk.pbworks.com/w/file/fetch/144429042/how_to_take_cover_off_graco_swing.pdfIn PDF document text
    • http://wikoborumun.pbworks.com/f/3193845588.pdfIn PDF document text
    • http://garigor.pbworks.com/f/how_to_work_westinghouse_tv_without_remote.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/f/when_is_twilight_midnight_sun_coming_out_in_cinema.pdfIn PDF document text
    • http://noxixap.pbworks.com/f/sabexuxibet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23A42 5376 bytes
SHA-256: 1b47a2ef0a8955126cce120357a12a628079a35f1f7a572618444178eefba70f
font_01_sfnt_off00024cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24CC7 11852 bytes
SHA-256: 92dc43779276754417eeec7a56966eae81c68ef17c0e814c94eba850bf549f1c
font_02_sfnt_off0002757b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2757B 16084 bytes
SHA-256: ce90dcb8f80a691a226d66d7b9fb40db13b52946125f6d312f8860abae454107

Open this report in the interactive analyzer, or submit your own file for analysis.