Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b1f6b4d74e9d27…

MALICIOUS

PDF

32.3 KB Created: 2020-05-13 12:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6ddc683e4f59ec87b2865332cd1d4944 SHA-1: 8547e99cd30d92af3d7bbde9cc694a46ebac4c35 SHA-256: f7b1f6b4d74e9d272ee39dd32d737e808df7277a4d54b160113b649412769d69
102 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link/Object: User Execution: Malicious Link T1566.002 Phishing: Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content is designed to trick the user into installing a browser extension or update. This is a common social-engineering technique to facilitate malware delivery or credential harvesting. No scripts were extracted from this sample.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://machoco.com/uploads/1/3/0/5/130551058/130551058.html#english+grammar+test+with+answers+online
    • http://artforgoodnesssake.com/uploads/1/3/0/6/130604972/baxupowiwimekulivab.pdf
    • http://cousinsgrub.com/uploads/1/3/1/3/131379730/814ab172dbff.pdf
    • http://btcconsultingservices.org/uploads/1/3/0/7/130776661/4870863.pdf
    • http://opuscs.org/uploads/1/3/1/4/131454916/kokaxebufer.pdf
    • http://immanuelinc.org/uploads/1/3/0/5/130542920/wirota.pdf
    • http://sheltermusic.org/uploads/1/3/0/6/130639533/6827054.pdf
    • http://gearnet.xyz/uploads/1/3/1/1/131164351/77d5ff7bdb9.pdf
    • http://2inspire2bfree.com/uploads/1/3/0/5/130551456/e9c7d30.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_off000053b9.bin
670533706f86a209d6ee152c2b236ae0628ed06fcfb5fb51e881a0ecf6723054		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53B9 10156 bytes

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