Malicious PDF — malware analysis report

Static analysis result for SHA-256 c507a6940b32e71e…

MALICIOUS

PDF

37.6 KB Created: 2020-04-07 11:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b1335157644d74e50262cb4c9342a6f3 SHA-1: 5edb4abb2f2cedaabd5653ff324ab6c6bfe4098e SHA-256: c507a6940b32e71e34339f3e890966546d83dc0172803c2fcf54ba750549b833
92 Risk Score

Malware Insights

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

The PDF 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 distribution mechanism. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent. No scripts were extracted from this sample.

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://uncleshawaiianhotsauce.com/uploads/1/3/0/6/130604109/130604109.html#mito+de+narciso+resumo
    • http://craftymidwife.com/uploads/1/3/1/3/131382030/5972658.pdf
    • http://daretosignup.com/uploads/1/3/0/4/130483848/b423d5680f6469d.pdf
    • http://multicastaustralia.com/uploads/1/3/0/7/130740018/nowur-bemetumasoda.pdf
    • http://omidvardesign.com/uploads/1/3/0/5/130551299/xonoxilixenata_gipugasokomapaj_duzazeko_veburinix.pdf
    • http://marbleminders.org/uploads/1/3/1/0/131071175/dewetixivi-daxogekobegoso-bexemoba-lunukuk.pdf
    • http://printalluk.com/uploads/1/3/0/7/130776083/pupoxokavarazuw.pdf
    • http://ashleygrandkoskiacupuncture.com/uploads/1/3/0/3/130323928/fad810ad1242be.pdf
    • http://comicbrickbuilder.com/uploads/1/3/0/5/130539795/5e0332d.pdf
    • http://renu-painting.com/uploads/1/3/1/3/131381428/pawaxasomevojinaxese.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_off00006907.bin
dc6b3a9c7504c6bdb097c1baab2e1f484ac74abe87573cf19e58e6fc86335b80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6907 9492 bytes

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