Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f4048fc78488c3…

MALICIOUS

PDF

31.6 KB Created: 2020-04-27 02:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 03ba54326bc72ce5d7729ad742e95ae0 SHA-1: 2ddc0c95b35825ee02cbc44faf921940c440df5b SHA-256: c4f4048fc78488c35428ed7f5c4f53fdfc5c220bb2b7eb45b9f1d0de935dd443
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 with numeric slugs, characteristic of a link farm designed to host malicious content or phishing pages. The heuristic PDF_SEO_LINK_FARM firing indicates this behavior. The embedded URLs point to various domains, suggesting a broad distribution effort. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://buildthefuture-consulting.com/uploads/1/3/1/3/131384442/131384442.html#possessive+pronouns+worksheet
    • http://gmountbattenllc.org/uploads/1/3/0/5/130588257/toresegovesek.pdf
    • http://link2evolve.com/uploads/1/3/0/6/130603702/zixozukuweroma.pdf
    • http://jehassociates.com/uploads/1/3/0/6/130621956/nirixog-ximaka-zaxuvamelisew.pdf
    • http://sylteszeri.com/uploads/1/3/0/4/130476760/892f08.pdf
    • http://honesthomebuyersllc.com/uploads/1/3/1/4/131412235/790425d6a3e9176.pdf
    • http://mikealfieri.net/uploads/1/3/1/4/131438672/675935.pdf
    • http://moodymountainmedica.com/uploads/1/3/0/7/130775527/sazufubesulodep_xolefif_jitudewegaper_pefenulizogor.pdf
    • http://careersinyouth.com/uploads/1/3/0/2/130287953/zizob.pdf
    • http://thirdcoasthealth.org/uploads/1/3/0/7/130739944/zazanidemiwit.pdf
    • http://mysaphi.com/uploads/1/3/1/4/131407163/xoduno.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_off000054e7.bin
ebe0da2b7e4cfd034c96f4bef273ef4051b76a7de2f0fbdfcbe0f20f86185b4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E7 7844 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.