Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9ca4c7a0ac9c29…

MALICIOUS

PDF

37.4 KB Created: 2020-04-10 17:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 133e5eb25e4fe4ef02f2fae3249a195e SHA-1: c2c3a290858f7629dd7a1bf578cf15d668d66555 SHA-256: 1f9ca4c7a0ac9c29181201cc4231895fb572dadb04b5f8d4a9c6ecf3d6a9eec2
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded external links, a technique commonly used for SEO spam or to direct users to malicious websites. The ML classifier strongly indicated maliciousness. The document body contains a deceptive title 'Watch the purge election year' and references the wkhtmltopdf tool, suggesting it was programmatically generated to host these links.

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://donnatodelao.net/uploads/1/3/0/5/130550681/130550681.html#watch+the+purge+election+year
    • http://peopleshistorychicago.com/uploads/1/3/1/3/131398268/9085994.pdf
    • http://dynamicsport.org/uploads/1/3/0/6/130604202/wowaravakulos_mudafivup_gelef.pdf
    • http://darianmaroney.com/uploads/1/3/0/5/130588187/gomakutizoba-darusurobuzus-powejujog.pdf
    • http://koosseiklema.com/uploads/1/3/0/3/130324416/munimasipudezol.pdf
    • http://sjarmtrollbua.no/uploads/1/3/1/4/131437443/8945045.pdf
    • http://auburnblueinc.com/uploads/1/3/0/4/130483645/a98f69e62a4b25.pdf
    • http://acehomestay.com/uploads/1/3/0/6/130603741/foses_jatozatux.pdf
    • http://pratfallingthroughlife.com/uploads/1/3/1/4/131438304/xijonifedodi_pemasewasolug.pdf
    • http://amymariakidmohair.com/uploads/1/3/0/6/130639215/kuwirufilovoro_lidavirogijaz_fitosepez_sizibotiwududul.pdf
    • http://special-tek.com/uploads/1/3/0/3/130313026/sinewafaf-vudunibeve.pdf
    • http://tstens.com/uploads/1/3/1/3/131380609/gobazi_rosegem.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_off000069bb.bin
f5f3eade63c0dc18ed373be58b1993046e426a81c8c45a4f52a8605ab349b9d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69BB 8000 bytes

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