Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d64bd7d5bc2c612…

MALICIOUS

PDF

40.9 KB Created: 2020-04-13 09:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7816d7cf55417639643cac721a32597a SHA-1: 920fec4df5afcb12427c825368a7918418688cce SHA-256: 4d64bd7d5bc2c6120ff672a54649719d47633b09d67e86f75344a90dc9415ed5
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which point to other PDF files hosted on similar domains. This behavior is indicative of a link farm or SEO spam campaign. The document body contains medical-related text, likely as a lure to attract search engine traffic and unsuspecting users. No scripts were extracted, but the heuristic firings strongly suggest a malicious intent to redirect users to potentially harmful 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://theovercomersblueprint.com/uploads/1/3/0/2/130291527/130291527.html#ceftriaxona+en+el+primer+trimestre+del+embarazo
    • http://patriotkelly.com/uploads/1/3/1/3/131384260/gumabaxewimimewiwule.pdf
    • http://awoods.vip/uploads/1/3/1/3/131380470/2ae16b79b217e.pdf
    • http://petchef.pet/uploads/1/3/0/5/130551258/jodev.pdf
    • http://ledomaineducerfdore.com/uploads/1/3/0/4/130478160/6235c358b5c2474.pdf
    • http://tomerperry.com/uploads/1/3/0/9/130969663/lubuzukofofoku_dirogalotabozef_fewozepenanek.pdf
    • http://omundoeolimite.com/uploads/1/3/1/4/131438767/61c7d243335e2d.pdf
    • http://wendywangauthor.com/uploads/1/3/1/3/131381046/2117120.pdf
    • http://willbrossalmonco.com/uploads/1/3/0/7/130776393/2970950.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_off00006360.bin
1acfcccd75d0f7eecf4e388cf71684d1ab26a25fbca0d14cd0f9b372c131778e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6360 7976 bytes
font_01_sfnt_off000080c6.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C6 16036 bytes

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