Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc96a00ab13d2d0…

MALICIOUS

PDF

36.8 KB Created: 2020-04-13 16:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bdbc211242d93dfaed34b404c34f3aaa SHA-1: 881a0d8bc978b566cf0eb85a35a9df3299bd1447 SHA-256: 7bc96a00ab13d2d0cc1e03db60bd3ac20f9e7acdb74a345844e3b28934fef309
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The primary embedded URL, http://henrywestglproposal.net/uploads/1/3/1/3/131398493/131398493.html, is likely part of this scheme. Although no scripts were explicitly extracted, the presence of numerous external links in a PDF document strongly indicates an attempt to redirect the user to potentially malicious content, aligning with spearphishing tactics.

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://henrywestglproposal.net/uploads/1/3/1/3/131398493/131398493.html#teatro+venustiano+carranza+dentro+del+deportivo
    • http://soulintegration.com.au/uploads/1/3/0/4/130476327/5111476.pdf
    • http://laquota2punto0.com/uploads/1/3/0/9/130969418/vixinepexubinekemeb.pdf
    • http://nohaygasaqui.org/uploads/1/3/0/5/130550921/filororobizav_pezulexe_tokizu.pdf
    • http://4wheelsformeals.com/uploads/1/3/0/5/130540186/xumelidu-xeperuxekev-deririziri.pdf
    • http://boylston275.org/uploads/1/3/1/6/131607117/e4ab2.pdf
    • http://flux-functional.com/uploads/1/3/1/1/131164497/6590261.pdf
    • http://fearlesslyreal.com/uploads/1/3/0/6/130639976/mowik.pdf
    • http://agamirecords.com/uploads/1/3/1/1/131164452/4384357.pdf
    • http://belezadesejada.com/uploads/1/3/0/6/130640029/bigetolelawivegan.pdf
    • http://healthnwellnesscbd.com/uploads/1/3/0/4/130483499/7314090.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050a8.bin
8ca929aab28a848e6791ee20a77fe4a34f6f774828abe61ac67a87d3982623d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50A8 8324 bytes
font_01_sfnt_off00006f49.bin
f304d5248de4d2d535e11e5a3f00133999c598ccb7ee943f2677ab784214679d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F49 16208 bytes

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