Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0a6eed54880281…

MALICIOUS

PDF

46.2 KB Created: 2020-03-30 03:37:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 02c8da55494c4c79184840381249fb7e SHA-1: 310bfe94f74b5bacf12880a837cec7f3ee36836a SHA-256: df0a6eed54880281827128f806c04ea72241f19b093d6c14980fe39a007bf8c6
92 Risk Score

Malware Insights

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

The PDF file is identified as malicious by an ML classifier. It contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious content. The document body presents a lure of a GED reading practice test in Spanish, which is likely a pretext to encourage users to click on the embedded links. The primary attack pattern involves a link farm designed to lead users to potentially harmful content hosted on numerous domains.

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://creativecommunicationsls.ca/uploads/1/3/0/8/130874308/130874308.html#ged+reading+practice+test+in+spanish
    • http://jhoanrivas.net/uploads/1/3/0/4/130489123/8484b41119556.pdf
    • http://mavasol.nl/uploads/1/3/1/3/131378999/2339235.pdf
    • http://staychill.com/uploads/1/3/0/3/130313191/f339ec44be.pdf
    • http://urbanadanceco.com/uploads/1/3/0/9/130969403/29e99f49c85f3.pdf
    • http://gamingchristian.com/uploads/1/3/0/3/130323522/1d89b126e667.pdf
    • http://cortinasvalencia.net/uploads/1/3/0/8/130873868/bafa198f.pdf
    • http://jlservices.fr/uploads/1/3/0/6/130622080/8928893.pdf
    • http://ekogren.nl/uploads/1/3/0/7/130776873/vovufivelolarozelij.pdf
    • http://bostontangofestival.org/uploads/1/3/0/6/130621487/wupeminusuki.pdf
    • http://lobsterfestsaba.com/uploads/1/3/1/4/131437875/3cae198.pdf
    • http://nobookingfee.org/uploads/1/3/1/3/131380438/pirizabureziwatolu.pdf
    • http://lowcostphotobooths.co.uk/uploads/1/3/1/0/131070792/d816eaf3.pdf
    • http://stmaryofthepinesalumniassociation.org/uploads/1/3/0/6/130604342/xowoxibonizuvuf.pdf
    • http://northvanmusicacademy.ca/uploads/1/3/0/6/130639651/romowalilobepijumadu.pdf
    • http://fillzenpillows.com/uploads/1/3/0/2/130273753/misexa_xegadogis_nepufowovow.pdf
    • http://josealbafotos.com/uploads/1/3/0/4/130483067/valazubukedageg-sijebokola-fakojefa.pdf
    • http://countryseasonsbnb.com/uploads/1/3/0/3/130379210/7345354.pdf
    • http://acklader.se/uploads/1/3/1/0/131069992/521800.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_off00008b10.bin
810ab3ce0ecbe65313724d2fe5a4d331481e5b967c1dc3fa37f3f012ea1334eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B10 8752 bytes

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