Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db4d0a2ad05f1e4…

MALICIOUS

PDF

40.1 KB Created: 2020-04-14 07:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d98b83d9a233ef02285e65e518c69d7c SHA-1: bd1861ce0abdd83df85ca4ad0c400812261b099e SHA-256: 1db4d0a2ad05f1e4381675a8dd2b21bc285ec8e7db009a1f9ab9fc310a1aa696
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the pattern of the link farm, suggesting the primary purpose is to redirect users to potentially malicious 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://clickinteriordesign.net/uploads/1/3/0/6/130640009/130640009.html#catalogue+psd+template+free
    • http://smoke-joint.com/uploads/1/3/0/7/130738537/2639715.pdf
    • http://thel14.com/uploads/1/3/1/1/131163932/4582143.pdf
    • http://silvervalleyfarmsgooseeggs.com/uploads/1/3/0/5/130588463/d0f0a89a9d.pdf
    • http://followertofounder.com/uploads/1/3/0/8/130873941/536c23d6fae70af.pdf
    • http://thailandsbestnavarre.com/uploads/1/3/1/0/131070011/42f912c40e1788e.pdf
    • http://diazconstructiongroup.net/uploads/1/3/0/8/130873818/giruxaku.pdf
    • http://electricfairness.com/uploads/1/3/0/4/130483155/bosumanisodedegasopo.pdf
    • http://xtremechoice.com/uploads/1/3/0/3/130323290/maganitukexugomeko.pdf
    • http://leegayle.net/uploads/1/3/0/7/130739975/7777507.pdf
    • http://windallion.com/uploads/1/3/0/5/130588644/bupona-kosuwadexixupad.pdf
    • http://fieldsmanagement.com/uploads/1/3/0/6/130640046/6327688.pdf
    • http://windallion.com/uploads/1/3/0/5/130
    • 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_off00007653.bin
21d0c6409115f1bee7924cbc529460631e8779e17aa4ee9099171d55aad00e19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7653 7748 bytes

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