Malicious PDF — malware analysis report

Static analysis result for SHA-256 5700c1b6104ecab8…

MALICIOUS

PDF

41.7 KB Created: 2020-03-30 06:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 25afc6950296b471e02c75340f941a51 SHA-1: 51ef59056d8c65e92051a8089c40c7e2b9b10082 SHA-256: 5700c1b6104ecab86f69fb628e50b7c3403aa57dc5738b872b7d4f9a3b81f75d
96 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to SEO-optimized domains. The ML classifier strongly indicated maliciousness. The primary purpose appears to be redirecting users to a network of websites, likely for content delivery or further malicious actions. No scripts were extracted, and the document body text is largely obfuscated, but the presence of many external links is a strong indicator of malicious intent.

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://greenwolfverticalfarm.com/uploads/1/3/1/4/131438268/131438268.html#fenomeno+de+movilizacion+ciudadana+en+mexico+impacto+en+la+sociedad
    • http://jmarcyfit.com/uploads/1/3/0/4/130488604/2841047.pdf
    • http://sundayandpoppy.com/uploads/1/3/0/9/130969027/c7eac.pdf
    • http://xtremeretirement.org/uploads/1/3/0/4/130488371/3966098.pdf
    • http://mershard.com/uploads/1/3/0/5/130542769/054bd58a20f248f.pdf
    • http://hcxpay.io/uploads/1/3/0/6/130605216/tanivozura_tufadag.pdf
    • http://gentlemansboutiqueny.com/uploads/1/3/0/6/130639557/waxefodutunil.pdf
    • http://helpinghawk.com/uploads/1/3/0/7/130775676/rovib.pdf
    • http://thomasmclaughlinart.com/uploads/1/3/0/6/130621043/b9ce0feab03c8.pdf
    • http://moirarogers.net/uploads/1/3/0/5/130544110/rorujadowuvane.pdf
    • http://kevinsullivanandassociates.com/uploads/1/3/0/4/130488688/dibaz.pdf
    • http://mcdaniellawfirm.com/uploads/1/3/0/6/130620782/4699106.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_off00007648.bin
716a09bb3c707929e477e82bf7cdfba7e4b0234cd2a5e792430165e835777d15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7648 9120 bytes

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