Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db0445cb04439df…

MALICIOUS

PDF

43.6 KB Created: 2020-04-09 23:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 063d4fd0306d5692085d7bd8802bc50b SHA-1: d1aaf600ed13b1bac595f74be63f8888010fefb9 SHA-256: 7db0445cb04439df46479d84438d602dbbbf20ac06e31ece1de3a9ec3b14feff
92 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, pointing to various PDF files on different domains. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to these external sites, likely for SEO poisoning or to host further malicious content. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://rabidrabs.org/uploads/1/3/0/3/130313366/130313366.html#irma+fuenlabrada+pensamiento+matematico
    • http://paynezone.com/uploads/1/3/0/7/130739897/5681680.pdf
    • http://fullcirclewellnessretreats.com/uploads/1/3/1/4/131437780/3976849.pdf
    • http://globalisationindia.com/uploads/1/3/0/6/130620467/potowakizinumodowe.pdf
    • http://corbinjunkremoval.com/uploads/1/3/1/4/131406515/8302996.pdf
    • http://wortexmovies.com/uploads/1/3/0/5/130545087/bofulumanetabofeju.pdf
    • http://sparkfaith.com/uploads/1/3/0/7/130739445/509088.pdf
    • http://24baltimore.com/uploads/1/3/0/7/130775929/68e464332c.pdf
    • http://peterpancoop.com/uploads/1/3/0/6/130639055/zegunuxasux.pdf
    • http://contentconsulting.org/uploads/1/3/0/2/130270831/9367261.pdf
    • http://safe-boating.com/uploads/1/3/0/2/130289336/9769752.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_off00007f96.bin
aa1275fd5fa369f9f8e96fc24989d0da74e5cad1cc0a702cd967de271b19444e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F96 8892 bytes

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