Malicious PDF — malware analysis report

Static analysis result for SHA-256 467c59797527fffe…

MALICIOUS

PDF

34.7 KB Created: 2020-03-22 01:50:32 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d207fe719d7942f902972688f5036797 SHA-1: 3d359adde79faded8223807926239fc38ee12167 SHA-256: 467c59797527fffee0721c591d2a14862afe65841218f1fa39d4bb3dd1cfd351
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains, indicating a link farm or SEO spam tactic. The document body, though partially obfuscated, contains a lure related to creating a triptych, which is likely used to disguise the malicious intent of directing users to these external sites. The ML classifier strongly flagged this PDF as malicious.

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://fairfieldhomeinspection.com/uploads/1/3/0/5/130552016/130552016.html#como+hacer+un+triptico+en+word+2007+por+ambos+lados
    • http://jc-mixology.com/uploads/1/3/0/4/130476372/dorojep.pdf
    • http://mx.thestoreinstaunton.com/uploads/1/3/0/6/130620314/wiregafedanitup.pdf
    • http://jobs-kuechenhandel.org/uploads/1/3/0/8/130874627/3425231.pdf
    • http://campaignreportingservices.com/uploads/1/3/0/9/130969170/vevajedalokedixi.pdf
    • http://americusasylumllc.net/uploads/1/3/0/2/130270953/gozujaxufavo.pdf
    • http://zoelleboutique.org/uploads/1/3/0/7/130775674/zutanetow-mopitet-fivuduwewo-tawowadikiba.pdf
    • http://bartoncourtstudios.co.uk/uploads/1/3/0/4/130435870/madofidimoponujawe.pdf
    • http://mygraphicdesignteam.com/uploads/1/3/0/4/130488626/godagexutupi-bebopuv.pdf
    • http://welovetattoo.com/uploads/1/3/0/6/130620677/9718066.pdf
    • http://ameliaislandgifts.com/uploads/1/3/0/4/130483216/tajoxivizixave.pdf
    • http://fundiagro.com/uploads/1/3/0/6/130640110/4fa5792a9.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_off000062ca.bin
2eb2e2b8fe94c7f11925ecee03e16006c26f6c492446b48b238c2edc785190ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62CA 7180 bytes

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