Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc723f13f691c956…

MALICIOUS

PDF

34.3 KB Created: 2020-06-16 04:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8f450ddc1bfd15155d01f044c0e55cf SHA-1: da503f60365dfb346c9244ec58bb17da2c4ff460 SHA-256: cc723f13f691c95659f242542550e1ee39fd746da4784cc246483a0f83b2e95c
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique commonly used in SEO spam and phishing campaigns to direct users to malicious websites. The ML classifier strongly flagged this PDF as malicious. The embedded URLs point to various domains, suggesting a link farm or redirection infrastructure designed to host or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://destinationcelebrationtravel.voyagerwebsites.com/uploads/1/3/0/3/130379289/130379289.html#appalachian+trail+guide+tennessee+north+carolina
    • http://cpanel.halauhulaokaleimomi.com/uploads/1/3/0/2/130288637/gejosege.pdf
    • http://zencodesigns.com/uploads/1/3/0/5/130551623/9f2b61.pdf
    • http://tuliplawn.com/uploads/1/3/1/6/131606373/acf58c4fd50f99.pdf
    • http://trainingoptions.org/uploads/1/3/0/2/130289620/xumotofanig.pdf
    • http://whatchangedmylife.com/uploads/1/3/0/7/130775822/fajug_dowitalobixaji.pdf
    • http://carolyncoatesangelwingarts.com/uploads/1/3/1/3/131379792/sonobajojo-mixifazabetur.pdf
    • http://carclubgear.com/uploads/1/3/0/6/130604931/555319.pdf
    • http://portfoliobyjordan.com/uploads/1/3/1/8/131872238/7233232.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_off00005b74.bin
c159b2dfcf993309aa244d2e77c6c74ea70bf685e417d5179083ae5b2e6399e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B74 10208 bytes

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