Malicious PDF — malware analysis report

Static analysis result for SHA-256 7318b8b720e90ec2…

MALICIOUS

PDF

40.2 KB Created: 2020-06-21 03:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29a10aa31f9b91012dd3ba4872d5ef17 SHA-1: ad08dbb19f7985cd363e4cf5c6f5113619c09b93 SHA-256: 7318b8b720e90ec212849b0cdbcb014eab6795b459deaa44451055dba0563a99
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning tactic. The document body, though heavily obfuscated, contains URLs that are likely used to redirect users to malicious sites for phishing or malware delivery. The ML classifier strongly indicated maliciousness, and the PDF structure with multiple external links points towards a malicious intent.

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://sauerlandhypotheek.nl/uploads/1/3/0/9/130968912/130968912.html#runescape+king+black+dragon+guide+2012
    • http://financieelvrij.stephanvandertoom.nl/uploads/1/3/1/0/131070318/a5ecf00a3.pdf
    • http://squishslimee.com/uploads/1/3/0/7/130740438/pupokaxes_gulesuvuwopi_nagowafok.pdf
    • http://cryobytegames.com/uploads/1/3/1/4/131406985/paxopexita.pdf
    • http://mx.afftonparentsclub.org/uploads/1/3/0/6/130603859/bujivanidikupapijok.pdf
    • http://pikon.org/uploads/1/3/0/7/130776312/dekalafasuna.pdf
    • http://kaileyeskine.org/uploads/1/3/0/9/130969506/380759.pdf
    • http://dolbyart.com/uploads/1/3/1/0/131070089/071635b.pdf
    • http://apply.vibot.org/uploads/1/3/0/8/130874035/fogobipefakebi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fb1.bin
95f6b85cdbbc351c3065a544207db61ef052b6d71561e2f06b26696b7830ee14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB1 5580 bytes
font_01_sfnt_off000072a6.bin
c28b95df960ee3acf6b727887796842dba2d93da911b418672d10a88787a25b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72A6 9868 bytes

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