Malicious PDF — malware analysis report

Static analysis result for SHA-256 022aa237d7d8830a…

MALICIOUS

PDF

41.0 KB Created: 2020-04-06 12:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ae6d881c32d8617c78a7fecde2922611 SHA-1: a3318b28b76a655317e1896f88173fddee6c16d7 SHA-256: 022aa237d7d8830a7d5d629c292223d11f84aeb411e87077eb62b76e6d4d9cf7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, indicating a link farm or SEO spamming operation. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous URLs supports this. The document body contains text related to 'free snake games' and embedded URLs, suggesting a lure to potentially malicious or unwanted 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://southerndeltaboutique.net/uploads/1/3/0/6/130621839/130621839.html#juegos+gratis+de+la+viborita+snake
    • http://centralathletic.com/uploads/1/3/0/7/130739980/2f54384fda62b1.pdf
    • http://garrettdale.com/uploads/1/3/0/3/130323148/8079657.pdf
    • http://stonewallpaintball.com/uploads/1/3/0/5/130589002/xetoru-ribatolodune-bupez-porera.pdf
    • http://bluetorchfinance.com/uploads/1/3/0/3/130379285/zalewenubusefazositu.pdf
    • http://yeadong.com/uploads/1/3/0/7/130775507/wososugezujisop.pdf
    • http://mobilenotarywithbobbi.com/uploads/1/3/1/3/131379724/xolab-dupoxuzegap-nuxesi-koxononipomava.pdf
    • http://naturalsalmer.com/uploads/1/3/1/4/131452958/5535361.pdf
    • http://moyo-up.de/uploads/1/3/0/6/130604191/zinolelezigaguke.pdf
    • http://obriendevelopments.org/uploads/1/3/0/4/130435884/tebedojef_kafofi.pdf
    • http://mail.actg.org/uploads/1/3/1/3/131381369/5134637.pdf
    • http://mndball.com/uploads/1/3/0/8/130874170/593517.pdf
    • http://myleokingspage.com/uploads/1/3/0/4/130475965/5415403.pdf
    • http://bergcopy.com/uploads/1/3/0/7/130776582/0cd96448.pdf
    • http://simmonsmediaworks.com/uploads/1/3/1/4/131482953/filarojo.pdf
    • http://mradamscfci.com/uploads/1/3/0/3/130379843/7663725.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_off000069fa.bin
b803b346b40cdfa00460d4e31f3abd91672c8f8796c24cb057e649361ed9ca57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69FA 8432 bytes
font_01_sfnt_off000088de.bin
1fb84ba694783cd5ced5bd1569b0aaa99f62d274b7a4830ae9488bd86b9d67c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88DE 3416 bytes

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