Malicious PDF — malware analysis report

Static analysis result for SHA-256 9897309f8558077e…

MALICIOUS

PDF

38.6 KB Created: 2020-06-18 12:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8689fa192cf8d7b808b49f0fcb11bc5 SHA-1: 0cc6f7eb623a6e8be757b4607760c71e85c7304d SHA-256: 9897309f8558077e0d5fd7e0b2c726fa26fec03383221990a7b0c5dbf7db7e73
94 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to domains that appear to be part of a link farm or redirection scheme, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, contains text related to 'tree planting exercises' and includes several of these suspicious URLs. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lorrainepeignefineart.com/uploads/1/3/0/4/130491513/130491513.html#tree+planting+exercises
    • http://jaimielindsay.com/uploads/1/3/0/5/130589435/3189079.pdf
    • http://a1003453xstreamtravel.xsideas.com/uploads/1/3/0/3/130323302/nalikupuwokulozowuj.pdf
    • http://victorzhong.xyz/uploads/1/3/1/3/131381531/5151213.pdf
    • http://ipv6.baas-finance.nl/uploads/1/3/1/1/131164095/164ea.pdf
    • http://archrealtyhomes.com/uploads/1/3/0/5/130588380/jefapibulub.pdf
    • http://96-gmc-sierra.com/uploads/1/3/0/6/130604407/wutogumugivurasivu.pdf
    • http://matesradio.com/uploads/1/3/1/8/131871467/nadafotulojuful-bixotibedasefem-saziwixixakisal.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a47.bin
f501b031278d6e61c5e923c52250122b7f505929f39228935c15eac0973bee5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A47 4796 bytes
font_01_sfnt_off00006a99.bin
d6f4473c8082841b48435b512890c0e448be0ef30406592168ad798ef4efd6f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A99 10620 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.