Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d0f322f0c73932…

MALICIOUS

PDF

56.3 KB Created: 2020-04-19 01:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-09
MD5: ff97dde31902f4d425d987e441332c39 SHA-1: 1ec87d45c366fd54411b43a1cfb8100e615c5a2e SHA-256: 94d0f322f0c7393216a9d358be090eacf3faba5c58f8a215838e34d8f5d9882b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic PDF_SEO_LINK_FARM specifically flags this behavior. The document body contains garbled text and references to 'wkhtmltopdf', suggesting it may be auto-generated. The presence of multiple unknown URLs indicates a potential distribution or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9842

Heuristics 4

  • 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.
  • 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 http://cbdofmoody.net/uploads/1/3/0/5/130589251/130589251.html#bully+canis+canem+edit+pc PDF link annotation
    • http://charlestwagirarealestate.com/uploads/1/3/0/4/130436494/nobaf_vedosok_zaxawovabar_gonij.pdfIn PDF document text
    • http://supportrequesternauth.info/uploads/1/3/0/5/130543418/narorokoderijib.pdfIn PDF document text
    • http://richtersofatlanta.com/uploads/1/3/1/3/131380755/f2c0ee0.pdfIn PDF document text
    • http://thierryrmontoya.net/uploads/1/3/1/0/131071056/muvodewir-gaxig-zowufomadona.pdfIn PDF document text
    • http://tashastaxservice.net/uploads/1/3/0/4/130436282/fedokupeda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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_off00009697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9697 8524 bytes
SHA-256: 3cb733a5821b3664c91482259be55b1d08eace89650523f9be9b9c703c3894d1
font_01_sfnt_off0000b6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6FF 2652 bytes
SHA-256: e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc
font_02_sfnt_off0000c066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC066 16036 bytes
SHA-256: 1a48559509f7f75063a877bee3d72c2f3225c728dd953cebf65f9a5167f6cbd7