Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cbccc0546e11e97…

MALICIOUS

PDF

37.9 KB Created: 2020-03-22 02:33:42 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 936baf66420e72ebd4777930f51ce7ed SHA-1: a72e17ab72c2c4f8995b9af5f202d1a9a73945ec SHA-256: 6cbccc0546e11e974c3ba301d2b648d8f40912f26cd17b1191b2cd96e16a0b24
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links pointing to other PDF documents hosted on various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates this is likely a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the sheer volume of outbound links suggests a malicious intent to redirect users to potentially harmful content.

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://taylorgantt.com/uploads/1/3/0/6/130639774/130639774.html#como+dibujar+un+carro+paso+a+paso
    • http://www.purecann.ca/uploads/1/3/0/6/130603978/nenuxelarikujakoti.pdf
    • http://readoldhandwriting.com/uploads/1/3/0/6/130604815/laruduzi_zewifezu_zepalodadew.pdf
    • http://divacollectiononline.com/uploads/1/3/0/4/130477039/04d73f6.pdf
    • http://jmplumbingsolutions.com/uploads/1/3/0/4/130476778/mexanurevinavenoki.pdf
    • http://growtolearnnyc.org/uploads/1/3/0/6/130639083/6649758.pdf
    • http://joinskulls.org/uploads/1/3/0/7/130775288/8510566.pdf
    • http://latecritic.com/uploads/1/3/0/7/130739742/fetiwaviluxa.pdf
    • http://dukugrouphome.com/uploads/1/3/0/4/130483895/lilugufuzoko.pdf
    • http://hopehopelives.com/uploads/1/3/0/8/130815137/befotopuzu.pdf
    • http://technologyforteacherstechnologyproject6.com/uploads/1/3/0/6/130639217/7601053.pdf
    • http://susiecarononamazon.com/uploads/1/3/0/5/130540366/8905925.pdf
    • http://www.kpeggdesigns.com/uploads/1/3/0/2/130287799/nubel_kaliduparifa.pdf
    • http://minnesotafutsalacademy.com/uploads/1/3/0/6/130621387/jitagof.pdf
    • http://hanssl.com/uploads/1/3/1/1/131164499/mopeviforog_sobatifipit.pdf
    • http://utahpoultrypalooza.com/uploads/1/3/0/8/130814110/posarura_jepejeme_wapuzimoji.pdf
    • http://narrinspiceandsauce.com/uploads/1/3/0/6/130605275/8747971.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_off00006a0c.bin
b718930cd9cbc3a628cd7d5501b61951fae2b4502048ef72b4e834ccdc711157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0C 8404 bytes

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