Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd47313b6dd51f1c…

MALICIOUS

PDF

33.7 KB Created: 2020-04-06 06:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f2c4f21325226a32dd9bc2d9a919962a SHA-1: 976335fb90a35a006e42af109da33c3cc600098e SHA-256: fd47313b6dd51f1c3142209f3835210fda339f5c4217eb2b6c8749e890135da2
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or SEO spam campaign, designed to drive traffic to potentially malicious or unwanted content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of numerous external links suggests a delivery mechanism for further malicious activity.

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://smarthomescamerasandsound.com/uploads/1/3/0/5/130588999/130588999.html#saeco+royal+coffee+machine+price
    • http://lasvegasgrown.com/uploads/1/3/0/8/130814032/86ec36f26feca0.pdf
    • http://gottaluvthatbling.com/uploads/1/3/0/5/130540928/tewizugizuzazezadak.pdf
    • http://drxcleaners.com/uploads/1/3/0/5/130551558/nepadiwizax.pdf
    • http://adscarpentry.com/uploads/1/3/0/7/130739144/dadbd61c.pdf
    • http://enlightenedastrologycourse.com/uploads/1/3/0/5/130547405/fd68738.pdf
    • http://eenoelandassociates.com/uploads/1/3/0/7/130776213/dubozalasakole-kotenidowazi-nanonexaja-fegepokegiko.pdf
    • http://carterracing83.com/uploads/1/3/0/3/130379674/buxakuwamumugo.pdf
    • http://excellencefirst.org/uploads/1/3/0/5/130551449/ef80dec.pdf
    • http://iwantpatricia.com/uploads/1/3/0/5/130588627/jasereke-bidikavabub-falisetokazik.pdf
    • http://momtility.com/uploads/1/3/0/6/130639966/wakevewibelojo-visizekegov-ruvutaxu-wuvaxuwakegolaf.pdf
    • http://wwwlashmeeout.shop/uploads/1/3/0/4/130483205/52a6da2fc.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_off00006085.bin
9d5d341c409352ff53a34bde5ff520b2d4b5179754d8ad10fc45b9429eaa3263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6085 6356 bytes

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