Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd1b1064fd6859f…

MALICIOUS

PDF

43.5 KB Created: 2020-03-25 01:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b07150945a9898092f583c457f26eb24 SHA-1: 84760178716aac1f45be13731bf89bc2d83671f3 SHA-256: cfd1b1064fd6859f1f0ea2fd5261b92ed9016213a2acda90bbea227c11a35044
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supported the malicious verdict. The primary attack pattern involves directing users to a multitude of external resources.

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://mymissblue.com/uploads/1/3/0/7/130739103/130739103.html#13+reasons+why+season+3+ending+review
    • http://beadmesilly.com/uploads/1/3/0/5/130551210/dawawidajid-lolal-wevaravad.pdf
    • http://hostmaster.sennedehandschutter.com/uploads/1/3/0/9/130969594/52d7d.pdf
    • http://worcesterrootsfoundation.org.uk/uploads/1/3/0/6/130640109/ae020e520.pdf
    • http://mta-sts.mail.1301university.com/uploads/1/3/0/4/130477090/8418576.pdf
    • http://rizzleandprizzle.com/uploads/1/3/0/4/130491079/9436255.pdf
    • http://tara.agency/uploads/1/3/0/8/130813079/42e8adaf05.pdf
    • http://purealignmentchiro.com/uploads/1/3/0/7/130775968/buzovot.pdf
    • http://www.thehospicediaries.com/uploads/1/3/0/9/130969131/9435383.pdf
    • http://www.ernieshardware.com/uploads/1/3/0/4/130436096/2297e86b.pdf
    • http://dublintactical.com/uploads/1/3/0/4/130483980/jozomefopurupari.pdf
    • http://packdestock.com/uploads/1/3/0/9/130969889/6882711.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_off000082b2.bin
50afeed5331786d18e9d66846f2f0945ad87757ea723287605e86cea5d618825		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B2 7832 bytes

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