Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf668ef0ef640749…

MALICIOUS

PDF

40.6 KB Created: 2020-04-02 10:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 06776e6cac3f8c062f028ddcbc736151 SHA-1: d991a9db3a2a476aa811a29ade6d0114d70bf7d8 SHA-256: cf668ef0ef640749cae6dff2d253cfd1756abc7fd57efc7cdb94de1957f6b35c
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external link farm, suggesting a coordinated effort to distribute malicious content or phish users. The document body, though partially corrupted, contains text related to an ebook and metadata from wkhtmltopdf, indicating it was likely generated programmatically to host these links. The primary intent appears to be directing users to a network of potentially malicious websites.

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://cgpsl2.com/uploads/1/3/0/3/130323324/130323324.html#from+survival+to+recovery+ebook
    • http://pakalolochocolate.com/uploads/1/3/0/2/130272848/xebovuror.pdf
    • http://natashiapandther.com/uploads/1/3/0/5/130539225/xaxovu.pdf
    • http://elmswellkarate.com/uploads/1/3/0/3/130312996/kijelefagiriboxuxa.pdf
    • http://barkume.biz/uploads/1/3/0/6/130620716/pojireji.pdf
    • http://kjhjewelrydesigns.com/uploads/1/3/1/4/131454286/kuvidumil.pdf
    • http://trenchlawfare.com/uploads/1/3/1/0/131070072/kujowegop.pdf
    • http://rpwbeauty.com/uploads/1/3/0/3/130379138/magiraxukutanon-dulodofoxis.pdf
    • http://chalkituptohope.com/uploads/1/3/0/3/130379527/9512492.pdf
    • http://spcupress.org/uploads/1/3/0/2/130289711/176699.pdf
    • http://bipolarstarguide.com/uploads/1/3/0/6/130604292/760f5.pdf
    • http://505elementsstudios.com/uploads/1/3/0/6/130621030/7f15720.pdf
    • http://handsandheartshealingarts.com/uploads/1/3/0/2/130289749/jamere_zamosixipemol_murufozazidejas_tozejutapomunek.pdf
    • http://greatamericanlupusrace.com/uploads/1/3/0/7/130775429/dabiwem.pdf
    • http://jdvmusicandsound.com/uploads/1/3/0/6/130604767/nasurolimisaloguvugi.pdf
    • http://nopalitoranch.com/uploads/1/3/1/4/131453241/sibafojazowek.pdf
    • http://mta-sts.mail.responsivelaw.org/uploads/1/3/1/4/131409621/8966434.pdf
    • http://elopezlaw.com/uploads/1/3/0/9/130969220/xavozupe-xapasapawezega.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_off0000771a.bin
17e490f73ebd34b96530f03172952a316b2358d5202f2d21c38974a52ecd6af5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771A 7980 bytes

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