Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abd9528c519c99e…

MALICIOUS

PDF

77.7 KB Created: 2021-02-16 09:13:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: cc94ad2fbac6571f44088f87fffd53e7 SHA-1: da25aa17d4e8c508ab5b1e4f6c57d1544e554631 SHA-256: 0abd9528c519c99ea7c6817c0d07d25478b42bf2ff671404682173b76c6987cd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing lures designed to redirect users to malicious 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://druttle.ru/strik?utm_term=best+xbox+one+x+skyrim+load+order PDF link annotation
    • https://dofabogadu.weebly.com/uploads/1/3/0/7/130739956/31ec8.pdfIn PDF document text
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/7ffa5262a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393016/normal_5ffec5092fcb9.pdfIn PDF document text
    • http://visiblawty.com/peptide_bond_formation_in_ribosomei5se8.pdfIn PDF document text
    • https://cdn.sqhk.co/xugumewaz/Vxgg2lV/ritol.pdfIn PDF document text
    • https://cdn.sqhk.co/kitolitik/iIghhes/moneygram_money_order_replacement_online.pdfIn PDF document text
    • http://huseyincanx.com/607369842203ne6n.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/fifixilosoep0ph.pdfIn PDF document text
    • https://cdn.sqhk.co/lukapokobejo/Zp0wJjj/steam_properties_software_free_download.pdfIn PDF document text
    • https://rizigavitud.weebly.com/uploads/1/3/4/5/134581125/rozulanoxodola_jefodisulavimix_buxuvoge_denowi.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/6004342.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/rank_and_file_chess_board87xt9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459034/normal_5ffaf071a0060.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fujeximadotut.rf.gd/comment_installer_sql_server_2008_r2.pdfIn PDF document text
    • http://tokiwubamiwi.rf.gd/ballad_of_serenity_sheet_music.pdfIn PDF document text
    • http://vamagirizotaro.rf.gd/movies_available_for_on_netflix_canada.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE563 5184 bytes
SHA-256: e03a34fa4fb6914f5613f72789b02c12ab541c39eee9e0781b66374ba4a36d7f
font_01_sfnt_off0000f6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E7 10744 bytes
SHA-256: c55aa3cce689e2066e44ac946896472434f1550c8f0fd3a579c801d273fd2607
font_02_sfnt_off00011b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B76 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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