Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad20e481a841adf1…

MALICIOUS

PDF

34.7 KB Created: 2020-04-15 21:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 87a3adb573b8a8c2a517139b4c081a96 SHA-1: ff6b1695d949f7bcfc451e0140d1442900ab7c59 SHA-256: ad20e481a841adf1c5b916dd86e5e58b5188c6552976838f44bd01b54ad53357
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a significant number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, includes a URL that points to a 'carbon cycle review worksheet answer key', suggesting a lure to disguise the malicious intent. The primary goal appears to be directing users to a network of linked websites, likely for SEO manipulation or to serve further malicious content.

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://brandstormpromotions.net/uploads/1/3/0/8/130814630/130814630.html#carbon+cycle+review+worksheet+answer+key
    • http://houisa.com/uploads/1/3/0/6/130604091/manigekuxavakug_donep_nevem_fukugesuzo.pdf
    • http://larrygilbertpahl.com/uploads/1/3/0/4/130489066/8c9df.pdf
    • http://sixtoto.com/uploads/1/3/0/8/130814902/6dcbfcdd9b36c15.pdf
    • http://tbspeo.com/uploads/1/3/0/6/130603985/wafotuvanigitoragid.pdf
    • http://aceyoyo.com/uploads/1/3/0/7/130740464/25038.pdf
    • http://ucsfophthresidency.org/uploads/1/3/0/6/130604125/9411897.pdf
    • http://lemonadearts.com/uploads/1/3/0/6/130621351/bunuw.pdf
    • http://mysmelt.com/uploads/1/3/1/4/131482832/kifeganegafudup.pdf
    • http://thedoulamammaeffect.com/uploads/1/3/0/6/130621788/9049700.pdf
    • http://facilitationgrandeurpropre.com/uploads/1/3/0/6/130620781/famuwanivetixi.pdf
    • http://niagarasentinel.com/uploads/1/3/1/3/131382346/191943.pdf
    • http://moriahdawnshealingtouch.com/uploads/1/3/0/9/130969510/mudabugin.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000567b.bin
cb6888f4c6ed86c05ef6278eac8e37f78405d97eedd206ab39a2f06a77efa453		 pdf-font-stream PDF embedded font (sfnt) at offset 0x567B 8148 bytes
font_01_sfnt_off000075f5.bin
50224c6c483bfa86a10f62efd7baa2c756f8036c0a911ebd537387e21b2fb6f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F5 2732 bytes

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