Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a33ab03562e8405…

MALICIOUS

PDF

82.7 KB Created: 2020-04-11 05:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cb19b8352d047b95c501be772841ef37 SHA-1: 7cc2c86ef2ee99bdc49943d62634732f47c17c00 SHA-256: 5a33ab03562e8405d8af40631520a991d9cec7b3c177e86069dc8e9fa913b4e3
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, identified by the 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains, many of which appear to be part of a link farm. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect the user to potentially malicious content or to manipulate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

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://engagedencounterutah.org/uploads/1/3/0/6/130620317/130620317.html#infinite+rare+candies+pokemon+emerald
    • http://scouttroop79.com/uploads/1/3/0/4/130436207/1226681.pdf
    • http://a-lutz.com/uploads/1/3/1/4/131406435/gefopuju_pomuzutekopi_jupewaseruxisum_sabas.pdf
    • http://crystalshine.info/uploads/1/3/1/4/131409794/zixowuwariregu.pdf
    • http://storytrainingonline.com/uploads/1/3/0/7/130775506/xilevedumuxi.pdf
    • http://ezekielraine.com/uploads/1/3/1/1/131164439/jefolufi.pdf
    • http://rocksolidcorporateevents.com/uploads/1/3/1/3/131384301/6b7fb06b67cd.pdf
    • http://healingrhythmsretreats.com/uploads/1/3/0/7/130776861/mokusabovoz.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_off00011d62.bin
6ca7cb3691c42aa9a86e844ecbe2dbf2cf707530a4dbdb8bba4468fae7f1bf8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D62 8672 bytes

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