Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e3e7c8828c3528…

MALICIOUS

PDF

32.1 KB Created: 2020-05-14 10:39:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 72dfadc842207ecefe9523cffd456d3d SHA-1: f94d1a5afadc817c9dfa5a1459da7b5bd9385a91 SHA-256: 59e3e7c8828c35280d1016395035253d7837ae01a348d3442e076f4bf4de7931
70 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, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content. The document body, though heavily obfuscated, contains text related to 'Pathophysiology book pdf', suggesting a lure to entice users to click on the embedded links. The heuristic 'PDF_SEO_LINK_FARM' strongly supports this assessment, indicating a deliberate attempt to create a network of linked documents.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://youbrewchicago.com/uploads/1/3/0/4/130488498/130488498.html#pathophysiology+book++pdf
    • http://daveschnitter.com/uploads/1/3/1/6/131636625/fafoxadixajuw.pdf
    • http://jmcdragons.com/uploads/1/3/1/4/131453006/tulumeku.pdf
    • http://thepowerofred.org/uploads/1/3/0/5/130550743/kimixekab.pdf
    • http://omnitecwireless.com/uploads/1/3/0/9/130969833/vezoxinoto.pdf
    • http://drhelencho.com/uploads/1/3/1/4/131406827/13d33232.pdf
    • http://cherylmanningconsulting.com/uploads/1/3/0/6/130604599/tanuzewituzosiw.pdf
    • http://handymandanny.com/uploads/1/3/1/3/131380539/nasijevupufizoz.pdf
    • http://glamkings.com/uploads/1/3/0/2/130273748/e0fadc24f15f.pdf
    • http://cpanel.adrianamedinacagan.com/uploads/1/3/0/8/130874261/73a838268be94.pdf
    • http://precisionsprayparts.net/uploads/1/3/0/7/130775537/monogi.pdf
    • http://fuckyellowsweater.com/uploads/1/3/1/0/131070238/e3d93.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_off00005468.bin
aca325fa23cfd3ad3cec79b61a0495624ee2384068a4b1c5fbf49b0c0f198953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5468 9752 bytes

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