Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8995761bc28a756…

MALICIOUS

PDF

32.6 KB Created: 2020-03-23 16:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f9fac8597905435acbe98c34a6d9bace SHA-1: 25d84162e187f2fe68ea45732fbf0c18f20e60e5 SHA-256: d8995761bc28a7566b37d1df16741116fb047c0b4b7956bf37f0f6fb62b12271
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm for SEO manipulation or to host malicious content. The document body, though partially corrupted, contains references to a 'Panasonic fv-11vq5 service manual' and 'wkhtmltopdf', indicating a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link farm or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://rosebudtel.info/uploads/1/3/0/5/130545745/130545745.html#panasonic+fv-11vq5+service+manual
    • http://www.rlassociates.net/uploads/1/3/0/4/130435843/832fe249c.pdf
    • http://www.seasonedservices.com/uploads/1/3/0/6/130620966/kawete_fijexubed_sinekuv_gagemezewa.pdf
    • http://thematthewaffair.com/uploads/1/3/1/1/131163836/5683763.pdf
    • http://www.ipvtrainingandconsulting.com/uploads/1/3/0/4/130436078/1919849.pdf
    • http://grapheneglobalfund.com/uploads/1/3/0/7/130739729/fe7d7a6fa9b6b20.pdf
    • http://withlovec.blog/uploads/1/3/0/5/130589399/2659904.pdf
    • http://shotsbarandgrill.com/uploads/1/3/0/6/130621865/b153c57074.pdf
    • http://eeshv.eesforjobs.com/uploads/1/3/0/6/130639028/2593321.pdf
    • http://myoptimalhealthylife.com/uploads/1/3/0/7/130775087/pafutawa_fetogatifa_wawexo.pdf
    • http://mta-sts.lfhsfoundation.org/uploads/1/3/0/7/130740371/nadulixi.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_off00005801.bin
4ca4d4b49a99c524c6bfbd6968cd7d16f79934948619438902b5e2955b93d211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5801 7532 bytes

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