Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8b6d4bc8e58079…

MALICIOUS

PDF

39.8 KB Created: 2020-06-15 21:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3b9651573a6f4c05b54956964bb64d7 SHA-1: 9b38db475a3c9e4ae5937fd26b0d5c8bf3dacf16 SHA-256: de8b6d4bc8e58079bf5e57f6fa67158bed7ae7cb74c619aa7f00021b0a68796c
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links to various domains, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier strongly indicated maliciousness. The document body text and extracted URLs suggest a lure to download further content, likely malware or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://hairbycassadi.com/uploads/1/3/0/6/130639865/130639865.html#the+walton+experience+free+pdf
    • http://mta-sts.mail.forestlanebotanicals.com/uploads/1/3/0/3/130323466/7096159.pdf
    • http://mikewolfcom.com/uploads/1/3/1/4/131454656/vowet-jodapugifavekug-munapitulizul-rotokotawugofu.pdf
    • http://smutandbonbons.com/uploads/1/3/0/8/130873953/rirabedezexug_xebivode_tajomelok_tovup.pdf
    • http://kulturenaturalhair.com/uploads/1/3/1/3/131379213/makazokudoj.pdf
    • http://katskornerinternational.org/uploads/1/3/1/4/131438202/razonegupel_boriz.pdf
    • http://msemmashairgrowth.com/uploads/1/3/0/6/130604687/00eec.pdf
    • http://action-appliance-installation.net/uploads/1/3/1/4/131452823/jarugexugiloner_didivuku.pdf
    • http://74-123-72-36.mgwnet.com/uploads/1/3/1/1/131163505/551618.pdf
    • http://74-123-72-36.mgwnet.com/upload
    • 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_off00006ded.bin
f3cd5f40cefde4b30cbaae5149a1bd2bc458d5234af2e8ef4d9480a894c98e14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DED 11216 bytes

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