Malicious PDF — malware analysis report

Static analysis result for SHA-256 b917f622be7e89d7…

MALICIOUS

PDF

42.5 KB Created: 2020-03-28 14:02:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 590582243f79eff4f223ac98d8f1b088 SHA-1: 5ad02f0d482f94da2c47760a33f02c4aacbebf1c SHA-256: b917f622be7e89d78cdbbe1bde229ed34d7ea09638f5c9ea879d5ecf95532dfb
62 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, forming a link farm. The document body text includes a specific search query related to a 'Rheem hot water heater error code 13', which is likely a lure to attract users searching for technical support. The primary purpose appears to be SEO manipulation and driving traffic to potentially malicious or ad-filled websites.

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://starrmark.net/uploads/1/3/0/7/130775880/130775880.html#rheem+hot+water+heater+error+code+13
    • http://shopsmco.com/uploads/1/3/0/7/130775029/3083300.pdf
    • http://sistahspacemidwifery.com/uploads/1/3/0/2/130271002/dc1f268a2b4b1.pdf
    • http://ilovefatjacks.net/uploads/1/3/0/7/130739970/suweretaso.pdf
    • http://www.fchsstem.com/uploads/1/3/0/8/130813516/e36e4cf21.pdf
    • http://mta-sts.mail.lillydip.com/uploads/1/3/0/7/130776230/vovimojonuluv.pdf
    • http://gracelifeapparel.com/uploads/1/3/0/6/130639760/xawixerosanid-rolabij.pdf
    • http://www.mail.emcspreaders.com/uploads/1/3/0/5/130544652/2072157.pdf
    • http://foodeventsdenver.com/uploads/1/3/0/6/130639629/3960350.pdf
    • http://www.kpugaming.com/uploads/1/3/0/5/130544547/9314422.pdf
    • http://affordablelegalforms.com/uploads/1/3/0/5/130541064/garasixop.pdf
    • http://localbitprice.com/uploads/1/3/0/5/130551014/5cc08cbf79.pdf
    • http://www.graniteconsultingllcscam.com/uploads/1/3/0/3/130312972/jimawinebowow.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_off00007ef1.bin
b64c23d3b742c91d656e49a8002b2a3c06d176e6d6430e6cb755825ba79e8aa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF1 7832 bytes

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