Malicious PDF — malware analysis report

Static analysis result for SHA-256 be37b57b2ee1d971…

MALICIOUS

PDF

40.3 KB Created: 2020-03-30 11:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 099b7fcb086762af90f9aa7e76949d52 SHA-1: e716453e4ede0b5a882ed31fceaf507ec064eaec SHA-256: be37b57b2ee1d971cc514fa548784a34047096d0e03e102ef0f931b425acfc76
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body itself contains text related to a '1996 honda fourtrax 300 repair manual', which is likely a lure to encourage clicks on the embedded malicious URLs. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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://74-123-78-154.mgwnet.com/uploads/1/3/0/5/130541313/130541313.html#1996+honda+fourtrax+300+repair+manual
    • http://siemenscolombia.com/uploads/1/3/0/7/130776168/susafebuzekomifiwep.pdf
    • http://shannanstanciuforschoolboard.com/uploads/1/3/0/6/130639054/2685788.pdf
    • http://shoptenthmuse.com/uploads/1/3/0/6/130620700/55855dfc2be1.pdf
    • http://ladylefeu.com/uploads/1/3/0/2/130270967/gubukekesode.pdf
    • http://penglihatan-diatastembok.info/uploads/1/3/0/3/130323454/1694957.pdf
    • http://gotgases.com/uploads/1/3/1/3/131384789/regaxabulox.pdf
    • http://risingsunproduce.com/uploads/1/3/0/6/130621472/rarowojad.pdf
    • http://inspirations4u.org/uploads/1/3/0/8/130814676/xamuguw.pdf
    • http://bemotrip.com/uploads/1/3/0/5/130589014/7236058.pdf
    • http://fullertonhotels.com/uploads/1/3/0/5/130539432/b48c5.pdf
    • http://bettering-me.com/uploads/1/3/0/6/130620746/c2b1deba083d541.pdf
    • http://propertymanagementproblems.com/uploads/1/3/0/6/130620607/634626.pdf
    • http://leisureworldforsale.com/uploads/1/3/0/4/130483912/jesusigaxekafub_pifiwameba.pdf
    • http://phuzzband.com/uploads/1/3/0/3/130323547/2429575.pdf
    • http://oneagleswingsvic.com/uploads/1/3/0/6/130621281/b7e3c7.pdf
    • http://mjyoga.net/uploads/1/3/0/5/130588349/lonulavez.pdf
    • http://albrilogistics.com/uploads/1/3/0/7/130776066/3672292.pdf
    • http://ruecrewclothing.com/uploads/1/3/0/5/130588874/zosebawoxepewavomusi.pdf
    • http://www.hemiauto.co/uploads/1/3/0/8/130815031/torowe.pdf
    • http://phillywaxing.com/uploads/1/3/0/6/130620949/muxewimibululebigulo.pdf
    • http://spaziperabitare.com/uploads/1/3/0/4/130476917/3902979.pdf
    • http://beingmadewholeblog.com/uploads/1/3/0/3/130323727/7140461.pdf
    • http://whoside.com/uploads/1/3/0/3/130312973/2747514.pdf
    • http://peterwinch.com/uploads/1/3/0/7/130776229/f0e155.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_off00007323.bin
966d42fbc3218b52b40a63f0b03e6fce3394a5cf52702c7901f8b2db85e862fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7323 7740 bytes

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