Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7931642c1b2b02…

MALICIOUS

PDF

37.9 KB Created: 2020-04-14 13:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2478ed14279a8830ff926df0bc0101da SHA-1: f3504891d69b98f0dcb105a7e72d5aa0b6c4ef89 SHA-256: 9e7931642c1b2b02a82c3d907a15fa09eef7ea6a86ccf2803b47c8ce450407a2
96 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, suggesting a link farm for SEO or phishing. The document body, though heavily obfuscated, contains text related to an 'injury report' and mentions 'patriots vs eagles', likely a lure to entice users to click on the embedded malicious links. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ankezimmermann.ca/uploads/1/3/1/6/131636677/131636677.html#injury+report+patriots+vs+eagles
    • http://boucledartetvelours.com/uploads/1/3/0/7/130739027/puvuduwutomop.pdf
    • http://roxinstallations.com/uploads/1/3/1/3/131379946/767e195f0.pdf
    • http://ourblacklist.com/uploads/1/3/0/8/130874389/4052776.pdf
    • http://ilovemiddletown.org/uploads/1/3/0/9/130969139/5057699.pdf
    • http://vanfloorservices.com/uploads/1/3/0/5/130541346/9430117.pdf
    • http://jillbuckfield.com/uploads/1/3/0/4/130490681/mojopolax.pdf
    • http://computersny.com/uploads/1/3/0/7/130775334/8822981.pdf
    • http://mccleanandgo.com/uploads/1/3/0/7/130738882/fokutoxux_fesisutowegariv.pdf
    • http://overthemoonopera.com/uploads/1/3/0/6/130620424/7254357.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_off00006cc0.bin
e11b58a651b0fb0314726ba701fd982cdbe6506c5105b442be4e3e59772d78de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC0 8048 bytes

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