Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be919f06c8eaa59…

MALICIOUS

PDF

33.0 KB Created: 2020-04-01 20:33:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 41fbf53d8363cb542a0ec392228d9361 SHA-1: db709ab5def872d766d4fd6e26d0778159505e79 SHA-256: 6be919f06c8eaa597b6214d26c01115908247b986a836ed42a9d264e1738bd07
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified as a PDF link farm. The primary URL http://adjuvotechnology.com/uploads/1/3/0/8/130874142/130874142.html#sao+season+3+english+dub is likely a lure, with the other numerous PDF links serving to inflate search engine rankings or host further malicious content. No scripts were extracted, but the ML classifier strongly indicated maliciousness.

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://adjuvotechnology.com/uploads/1/3/0/8/130874142/130874142.html#sao+season+3+english+dub
    • http://aroi-mak.com/uploads/1/3/0/6/130639997/bagumila_zaxisatig_vaxamakuvuz_libabadajuv.pdf
    • http://tributecinema.com/uploads/1/3/0/8/130874498/8036594.pdf
    • http://effortlesslybeautiful.store/uploads/1/3/0/4/130476691/8551426.pdf
    • http://unclesamssoftwashing.com/uploads/1/3/0/7/130739570/lujulakuvamutakoduli.pdf
    • http://banningproperties.net/uploads/1/3/0/7/130775838/3921650.pdf
    • http://anyamodel.com/uploads/1/3/0/4/130483871/xatoj.pdf
    • http://jbprotein.store/uploads/1/3/0/8/130813381/newuxa.pdf
    • http://kingofjerseys.com/uploads/1/3/0/2/130288579/tubenaxilemujifari.pdf
    • http://landtechlandscapes.com/uploads/1/3/0/2/130287221/3474245.pdf
    • http://catherinegtripp.com/uploads/1/3/0/6/130621579/5935322.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_off00005c7a.bin
e12dff508d4ab19eb176f7b684ca2e8b49b8fa930f9cc46489065155345fc402		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7A 6764 bytes

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