Malicious PDF — malware analysis report

Static analysis result for SHA-256 68abbf277acfb7e9…

MALICIOUS

PDF

39.3 KB Created: 2020-03-06 16:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: be0792ac8e10be3aae949de24e698fda SHA-1: beecc29ded2d5041444be3d11f9f303c22717ef5 SHA-256: 68abbf277acfb7e9dd6b66b78de1c9247cc962131722b3da894e14987b731154
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO spam campaign. The ML classifier strongly indicates maliciousness. The document body, though partially corrupted, contains URLs that are likely used to redirect users to malicious sites or download further payloads.

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://a1395559xstreamtravel.xsideas.com/uploads/1/3/0/5/130540159/130540159.html#interesting+conversation+topics+for+intermediate+english+students
    • http://dreamcatcherfishingtours.com/uploads/1/3/0/6/130621531/kabirefu.pdf
    • http://myfineswine.com/uploads/1/3/0/4/130483875/mikit.pdf
    • http://www.localhost.elkethoms.com/uploads/1/3/0/2/130272377/pozanajibirodigajove.pdf
    • http://staging.sailwhyc.com/uploads/1/3/0/9/130969427/supivasekitoti.pdf
    • http://destinyhouselafy.com/uploads/1/3/0/2/130272086/jitozedujorulowi.pdf
    • http://www.beekeepingandbrewing.com/uploads/1/3/0/2/130289746/porapivonutanavag.pdf
    • http://ericamcquiddypsyd.com/uploads/1/3/0/2/130289271/jekugagapa-pusivo-feluva-kixavedama.pdf
    • http://omeri.com/uploads/1/3/0/4/130435835/lebiji-sedajadipixaged-jivazaremusuta.pdf
    • http://mssciencefest.com/uploads/1/3/0/7/130776420/junuditomixifaz-lagafumawezidoz.pdf
    • http://wholesalefuse.com/uploads/1/3/0/7/130739817/a46b8abcc57b.pdf
    • http://ssphotography.net/uploads/1/3/0/3/130312937/8921631.pdf
    • http://www.pwsicecream.com/uploads/1/3/0/2/130271153/3444434.pdf
    • http://beautyaffair.org/uploads/1/3/0/6/130620556/6184777.pdf
    • http://peoniesevents.com/uploads/1/3/0/7/130739740/6a10633.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_off00006fe8.bin
d67605cf5cc4c197e4879a9287ba561a1075d519c7caf91147c3df363d92521c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE8 7564 bytes

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