Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a4ead8354354fb…

MALICIOUS

PDF

43.7 KB Created: 2020-03-12 02:07:26 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b5ae6dc8dc7d58ea49a29f1cd6d4ebe8 SHA-1: 10fa62a50149c998cd7f73ca087cedadfaa432b3 SHA-256: 10a4ead8354354fb3aa07a9fd271e697c270574fac11da8e9f25163acda1236b
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO manipulation tactic, designed to drive traffic or potentially host malicious content. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://magnoliastravelandtouradventures.voyagerwebsites.com/uploads/1/3/0/5/130547373/130547373.html#cara+menggabungkan+file+ke+satu+pdf
    • http://couverturesjoliette.ca/uploads/1/3/0/5/130589077/2252099.pdf
    • http://www.atsservices.org/uploads/1/3/0/9/130969695/fasufukej.pdf
    • http://fieldhockeygoalkeeping101.com/uploads/1/3/0/6/130621240/guzitevobade_pewodomenopisal.pdf
    • http://www.explorerbabes.com/uploads/1/3/0/6/130622038/lunoto_rateronupo.pdf
    • http://tpsnj.org/uploads/1/3/0/2/130287976/kexivunex.pdf
    • http://jimarcher.com/uploads/1/3/0/7/130739924/ratisujolafosozoz.pdf
    • http://vetraluminio.com/uploads/1/3/0/2/130289550/0eaf835.pdf
    • http://www.lindseyvlasman.com/uploads/1/3/0/5/130550970/8945938.pdf
    • http://womentakingitback.com/uploads/1/3/0/7/130776888/vujugazaxabo_pawenuluragis_lonezod.pdf
    • http://tampalandscapedesign.com/uploads/1/3/0/3/130313359/8c9d2cb.pdf
    • http://gwwatersolutions.com/uploads/1/3/0/2/130288549/8748671.pdf
    • http://lepiednoir.com/uploads/1/3/0/2/130288444/tuligixixazigataba.pdf
    • http://www.nwbuilder.com/uploads/1/3/0/7/130775565/165776.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_off00008161.bin
25b6cb1416bb60408ff05d6b05faf12019f9f653cbdd956c0cc8f342f65ee02b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8161 8372 bytes

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