Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7463cfa90fa74ed…

MALICIOUS

PDF

40.5 KB Created: 2020-04-04 15:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3627642cdd6275bbe09e1b477936aefa SHA-1: ba69bb41f4df3208498c8f25dd96367459f367f1 SHA-256: d7463cfa90fa74ed5645eb7deea96d45305778825210c0a25e9f89bd30a14343
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 pointing to various domains, indicating a link farm or redirection scheme. The ML classifier strongly identified this PDF as malicious. The document body, though partially corrupted, contains references to the URLs, suggesting they are the primary payload delivery mechanism. No scripts were extracted from this sample.

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://blessedbuildingconsultants.com/uploads/1/3/0/7/130739221/130739221.html#ejemplos+de+modo+infinitivo+con+funcion+de+mandato
    • http://gcourtneyphotography.com/uploads/1/3/1/3/131380420/7855928.pdf
    • http://leenalove.ca/uploads/1/3/0/3/130323319/nerazilifivew-fozijovutebeb.pdf
    • http://knwrzn.com/uploads/1/3/0/5/130552084/8820894.pdf
    • http://pureluxsalon.com/uploads/1/3/0/6/130604615/7606139.pdf
    • http://ukbusinessradio.com/uploads/1/3/0/6/130639739/fca91.pdf
    • http://odinsorganics.net/uploads/1/3/0/3/130323151/xexugijelezebofisu.pdf
    • http://kimengdahl.net/uploads/1/3/0/7/130740196/e2079ec48bc47.pdf
    • http://welloff.marketing/uploads/1/3/1/3/131381761/tolewurix_lutinunupalinet_tesokamuxari.pdf
    • http://gmestemps.com/uploads/1/3/0/2/130272928/6dc6acb03f02b.pdf
    • http://epictime.mx/uploads/1/3/0/6/130621228/2037076.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_off00007509.bin
3b3990152c9911c310ecff8c1a1d9b9490f9e8cfb1cbfcb438730d2a6671f50b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7509 8288 bytes

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