Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0308d9584772791…

MALICIOUS

PDF

34.2 KB Created: 2020-06-11 21:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0b28af37c714772c5016f9cec3580a3 SHA-1: 818593af01b7a280c1d16f650161cc2a7d5b5c86 SHA-256: b0308d95847727917c5da91ee08eb72a05e12bc9c3654abf615de1b84f09e587
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO poisoning attack. The embedded document body text, though heavily obfuscated, contains references to URLs that are also present in the link farm. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of this PDF. The primary goal appears to be directing users to a network of potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • 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
  • 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://adsl-63-204-18-15.benefitplans.org/uploads/1/3/0/2/130272928/130272928.html#blackberry+storm+pdf+reader
    • http://collectifcontraceptionliege.be/uploads/1/3/0/4/130483537/vogukulegumalipidi.pdf
    • http://latinosxlatinos.com/uploads/1/3/0/5/130547024/zozukil_gufefekogug_kikowukefa.pdf
    • http://ns1.creativeresourcesinc.net/uploads/1/3/0/7/130775923/vuliwemosim-tinobitumavof-jakizosomi.pdf
    • http://awake.band/uploads/1/3/0/6/130604772/ramotadajo.pdf
    • http://brooksmanagementconsulting.co.uk/uploads/1/3/0/4/130483243/litokamofarijutovas.pdf
    • http://worksbycindy.com/uploads/1/3/0/5/130539842/299985.pdf
    • https://sivavolujevu.files.wordpress.com/2020/06/33971092634.pdf
    • https://badupegenum.files.wordpress.com/2020/06/zovefemibitogigok.pdf
    • https://kelufenil.files.wordpress.com/2020/06/nudinazefofusex.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://forums.crackberry.com/s
    • 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_off0000546a.bin
9a32211383f61efb22ee75ff21a581c68e88ccaf817795f8fe57e3bb948af508		 pdf-font-stream PDF embedded font (sfnt) at offset 0x546A 12916 bytes

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