Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad55f2996499243…

MALICIOUS

PDF

81.9 KB Created: 2021-03-01 12:51:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ceb45ac2739f9067e56c9b3719e3f4e5 SHA-1: f9b43ca4ce0abb0f63bcd2ec64c81b8fbee257a8 SHA-256: 9ad55f29964992438ea61df2c060814750192a2f859ae07059ad7b68d23321db
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly suggest this document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/wix?keyword=chinese+dokkan+battle+apk+global PDF link annotation
    • http://opit.space/saxapubotuwixetewojimavoll8c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454670/normal_5ff1748813892.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/icihjdM/balanikojox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470977/normal_602b4351be2f7.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/A9jizgd/sirolimus_vs_tacrolimus_liver_transplant.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366008/normal_5fe1389dd45ad.pdfIn PDF document text
    • https://sitibopifug.weebly.com/uploads/1/3/0/7/130740553/pawexik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391909/normal_6037f85957046.pdfIn PDF document text
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/mituxowixapagew_munevewekuxubet_kunemelakizop_duzunerexobuz.pdfIn PDF document text
    • http://calipshatngaccs1.xyz/81792988270b5w5s.pdfIn PDF document text
    • http://braco.ru/physics_kinematics_equations_derivationf9w4m.pdfIn PDF document text
    • https://xevezuwojuko.weebly.com/uploads/1/3/0/7/130740392/5873196.pdfIn PDF document text
    • http://digitalcalakk1.xyz/295965799991w653.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/cJhcjd5/35260923088.pdfIn PDF document text
    • https://kizuzeno.weebly.com/uploads/1/3/5/3/135326612/1815667.pdfIn PDF document text
    • http://pshcomonhere.xyz/wuwaloxogabifovoxq2o2v.pdfIn PDF document text
    • https://nibapexi.weebly.com/uploads/1/3/0/9/130969889/vineresinokurin.pdfIn PDF document text
    • https://cdn.sqhk.co/gepaxulunan/fQAPdvT/40122719726.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/febopa/35129986176.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/14879140448.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/famusabuzidesazosibog.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_off0000ef58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF58 5236 bytes
SHA-256: ddba07d9d247cbc81391ff14818b15e58c6903b3431c136d4460f3a2b847fe7e
font_01_sfnt_off00010114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10114 10468 bytes
SHA-256: 04003548fd6d61d2a4401e737be17957961ccd70e598ec053627f4cac9456db1
font_02_sfnt_off0001251d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251D 16076 bytes
SHA-256: c6524a2d53ade1d2972796857cd9d0cdd75d05276fbf5b6525631b11f4b64c81

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