Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd19e3c9edd44a23…

MALICIOUS

PDF

35.1 KB Created: 2020-04-08 16:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c8283c418b972148df62413431a52efd SHA-1: de560fd02c23f91a963317a44463707d5373705f SHA-256: bd19e3c9edd44a23a404ece2a54a0badbcdcee5eab2c20548a75f091f8c18fcb
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicative of a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to a network of SEO-optimized PDF documents, likely to serve malicious content or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://wolfecityhomecoming.com/uploads/1/3/0/6/130621856/130621856.html#religion+de+los+olmecas+pdf
    • http://foreversay.com/uploads/1/3/0/6/130639373/79d3b2b63a981.pdf
    • http://elizabethmslocum.com/uploads/1/3/1/4/131454731/moxapesakifaze.pdf
    • http://crowd-sourced-training.com/uploads/1/3/0/8/130873715/deweponele.pdf
    • http://syneride.com/uploads/1/3/0/6/130604521/da9381.pdf
    • http://blessedfamily.net/uploads/1/3/0/6/130620653/genugifo.pdf
    • http://germanshepherdsla.com/uploads/1/3/0/6/130639074/gosiroxafofu.pdf
    • http://h2help.net/uploads/1/3/0/7/130775820/lagufikitekuvo_tezazazez.pdf
    • http://jessica-shearer.com/uploads/1/3/0/2/130272424/b3793cb9d4d6.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_off0000635c.bin
a144b8a74234b72eacbccd9c78e7d871dd71c491cc52f2e0c6fbcee45a7cc428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635C 7736 bytes

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