Malicious PDF — malware analysis report

Static analysis result for SHA-256 b040abd8024c2dd9…

MALICIOUS

PDF

72.4 KB Created: 2020-04-11 11:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-09
MD5: 9a32894acdec7d861edb79fb36822655 SHA-1: 48f6df417208069f0a1afc7eeef3e48a4c5fa27d SHA-256: b040abd8024c2dd9dfe2aee83167009aa7eb950ba00ca9d88018bf66a54425d3
116 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The embedded JavaScript stream and the extensive list of external URLs suggest that this document is designed to lure users to potentially harmful websites. The primary attack pattern involves a link farm designed to obscure the true destination and potentially host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://webdisk.collegedemsatiu.com/uploads/1/3/0/6/130604093/130604093.html#teachings+of+lord+caitanya+pdf PDF link annotation
    • http://jfwebdesign.ca/uploads/1/3/1/3/131379396/reraravuzonoso.pdfIn PDF document text
    • http://lbiwinefest.com/uploads/1/3/0/6/130604292/ec9e9759e.pdfIn PDF document text
    • http://ckreiner.com/uploads/1/3/0/9/130969310/92544.pdfIn PDF document text
    • http://style4cheap.com/uploads/1/3/0/5/130540642/8482704.pdfIn PDF document text
    • http://crossstateinvestigations.net/uploads/1/3/0/6/130620412/5817451.pdfIn PDF document text
    • http://commandcommunications.com/uploads/1/3/1/4/131406291/zevok.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C1 10280 bytes
SHA-256: 9772b826befc1f9fa576c8259035365203c99625f8b4db22260745a42fb19a6d
font_01_sfnt_off0000eb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB92 16940 bytes
SHA-256: f13313e7c20b242685d8e85a67c672161f53ba1a0ad3790b6e1db8c24975e2d9
font_02_sfnt_off00010396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10396 6760 bytes
SHA-256: 415525b9c7e8cde2319ade1b14aef4058e12f81a81ae411f3222c5ff369e4594

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