Malicious PDF — malware analysis report

Static analysis result for SHA-256 313f7f241b094c69…

MALICIOUS

PDF

37.2 KB Created: 2020-04-05 16:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c46b68f41eae2193fe016632a79c8347 SHA-1: 14ba3c85aa7ecd74f1a9f714850790b8679dc0ad SHA-256: 313f7f241b094c694b0e500375089e56b32300115fb971f96f7000cea7ec8673
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on similar domains. This pattern is indicative of SEO poisoning or a link farm designed to direct users to potentially malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the ability to determine specific payload delivery mechanisms.

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://hbcphx.org/uploads/1/3/0/7/130775723/130775723.html#juego+de+goku+para+2+jugadores
    • http://themackinnon.org/uploads/1/3/0/6/130621193/mubopebinozipanedas.pdf
    • http://draconicpictures.com/uploads/1/3/1/4/131438013/lolanet_funaxuzaz_kibitosoruga_menutiwewikiba.pdf
    • http://gsair.org/uploads/1/3/0/5/130589433/49a83183d4b.pdf
    • http://digitalisfoundation.org/uploads/1/3/0/6/130604309/7479080.pdf
    • http://saltedsunflower.shop/uploads/1/3/0/6/130620424/xujivategagazovil.pdf
    • http://solutionsbym.com/uploads/1/3/0/4/130489020/kudabomemil_ninogik.pdf
    • http://bidsaz.com/uploads/1/3/0/5/130539319/2536018.pdf
    • http://praxisglobalresearch.com/uploads/1/3/0/7/130740367/1894420.pdf
    • http://burialgenius.com/uploads/1/3/0/8/130873983/7582257.pdf
    • http://dentalgarate.com/uploads/1/3/0/6/130640021/2977812.pdf
    • http://mythbay.com/uploads/1/3/0/3/130323697/ca586.pdf
    • http://nba-talk.com/uploads/1/3/0/6/130604477/goxofawadiro-benizalavi.pdf
    • http://hex-apothecary.com/uploads/1/3/0/6/130620662/2c36af1aa7.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_off00006960.bin
21750bafe15437c589c0f27ef97b0af36c422132ea727708138d2f3a61ed682a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6960 8324 bytes

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