Malicious PDF — malware analysis report

Static analysis result for SHA-256 6040478876705848…

MALICIOUS

PDF

35.7 KB Created: 2020-04-14 01:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2e0aac8a146106f05692e04d11cf81f2 SHA-1: 981d23f61bec6d1ecd8c54ef186ca22fde519777 SHA-256: 6040478876705848ff62fa4d76b864627a0bbfbf9ce5fbe57ea7314078729d05
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a compromised or malicious web page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://saculcalucerna.com/uploads/1/3/0/4/130436145/130436145.html#video+converter+to+mp4+free++online
    • http://maverickleedebtconsolidation.com/uploads/1/3/0/6/130620142/mewajapurin_zogasife_losefosavapez_peritesemakefip.pdf
    • http://johnstonespiritualistchurch.com/uploads/1/3/1/4/131438110/d7b828a558.pdf
    • http://affland.com/uploads/1/3/1/3/131384765/f8a0faf0.pdf
    • http://rawlinson4delegate.org/uploads/1/3/0/6/130621111/203552.pdf
    • http://aspirescuba.com/uploads/1/3/0/7/130776263/288522.pdf
    • http://ctruin.com/uploads/1/3/1/4/131413718/235798301.pdf
    • http://recardiolt.xyz/uploads/1/3/0/6/130639259/138560.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d4.bin
105c28bdc0a4000eba903ab3952c3000127e473e45f74e4605bc96b693876dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D4 8480 bytes

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