Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fe9a625e03cd92…

MALICIOUS

PDF

34.7 KB Created: 2020-04-06 04:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 37ca42e37d03e6b1971517557510b8b8 SHA-1: 20e9acfbf4c963712567a2c2f582104042602a90 SHA-256: 22fe9a625e03cd929c2606171538bdbd73c6b37f56771b50189bb5b054871864
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or redirection mechanism. The ML classifier also strongly indicated maliciousness. The primary intent appears to be directing users to a network of external sites, likely for SEO manipulation or to serve further 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://bigdsuperfoods.com/uploads/1/3/0/4/130488493/130488493.html#importancia+de+la+departamentalizacion+segun+autores
    • http://billyjackray.com/uploads/1/3/1/4/131407005/9852698.pdf
    • http://cultureconciergeonline.com/uploads/1/3/1/3/131383753/pagosu.pdf
    • http://mikefaceymusic.com/uploads/1/3/0/5/130546486/7367966.pdf
    • http://meghgorephotography.com/uploads/1/3/0/3/130313440/lezogubumenivadew.pdf
    • http://hippiedaisy.com/uploads/1/3/0/6/130603747/nilavakav.pdf
    • http://landscapeestimatingservice.com/uploads/1/3/1/0/131070331/39882.pdf
    • http://645tamara.com/uploads/1/3/1/4/131437976/1267295.pdf
    • http://ddcarpentrymaine.com/uploads/1/3/0/4/130436426/mikogix.pdf
    • http://realestateamychang.com/uploads/1/3/1/1/131163908/punafaxom-fodawo.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_off00006054.bin
c4c71e503f1499fd0a3ae1c5227a6ad213d55790b8096bc27ae00d2c91ab1372		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6054 7540 bytes

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