Malicious PDF — malware analysis report

Static analysis result for SHA-256 594757cfc1170289…

MALICIOUS

PDF

50.1 KB Created: 2020-03-31 09:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0252ba4cf057a7b8fdbdabd66fa97b2a SHA-1: 82e35bb61d3ab8adf391fff57f4907d113ae4f88 SHA-256: 594757cfc1170289fe02f4304e192dc20080a93df8687668ec517e73387bba73
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, characteristic of a link farm designed to manipulate search engine results. The primary heuristic 'PDF_SEO_LINK_FARM' indicates that the document is intentionally populated with numerous links to other PDF files hosted on various domains. The embedded URL 'http://activekidscoach.com/uploads/1/3/0/6/130639467/130639467.html#minecraft+applied+energistics+2+power' and the numerous other PDF links suggest a campaign to drive traffic to potentially malicious or deceptive content. The ML classifier also strongly flagged this PDF as malicious.

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://activekidscoach.com/uploads/1/3/0/6/130639467/130639467.html#minecraft+applied+energistics+2+power
    • http://jazzbonedawg.com/uploads/1/3/0/8/130814347/b2083f483a.pdf
    • http://mta-sts.openwindowdesigns.com/uploads/1/3/0/6/130603684/1786304.pdf
    • http://edenjoinery.net/uploads/1/3/0/4/130476351/5f375.pdf
    • http://innervatemassagetherapy.com/uploads/1/3/0/6/130604911/4130033.pdf
    • http://ronasdistractedfitness.com/uploads/1/3/0/4/130489539/662d5f090b9f.pdf
    • http://trinesigep.org/uploads/1/3/0/9/130969659/0633df214.pdf
    • http://donorchardphotography.com/uploads/1/3/0/4/130488282/xukef_fobab.pdf
    • http://freeapps-mobilesports.com/uploads/1/3/0/7/130739766/xavebasa.pdf
    • http://salusassistedliving.com/uploads/1/3/0/6/130604630/wopekozevazumim.pdf
    • http://germandesignhouse.com/uploads/1/3/0/8/130873839/314926.pdf
    • http://rejcontractorsandgreenhouse.com/uploads/1/3/0/7/130776737/wejofojeju-resakumituw-nikigu.pdf
    • http://sigma6apps.com/uploads/1/3/0/8/130813582/d3388a75.pdf
    • http://college4everybody.com/uploads/1/3/0/4/130436318/543723.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_off00009967.bin
eaf91b63034b4571738b97c62bc1e2ffb8498704b10130f28171a00121baf75b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9967 8324 bytes

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