Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f78eb874e0f1ca…

MALICIOUS

PDF

44.6 KB Created: 2020-04-18 02:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 27d4359de084fdbbc897899f8a9daea3 SHA-1: 13dcab577fc622d7166ad970830083609b0822cf SHA-256: b1f78eb874e0f1ca4d2e6b7c2be8546addd404f91877bef84469e15ad59c5844
132 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains, indicating a link farm or redirection scheme. The ClamAV detection as 'Pdf.Dropper.Agent' strongly suggests the file is designed to download and execute a secondary payload. The presence of a visual download button lure further supports the malicious intent of directing users to click on these links.

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8455080-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8455080-0
  • 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://sakarasjourneys.com/uploads/1/3/1/4/131437361/131437361.html#burger+king+logo+font
    • http://shutupimgay.com/uploads/1/3/1/4/131407045/mizokapunever-jowave-nidesonaxadepo.pdf
    • http://mycommunitypropertymanagement.org/uploads/1/3/1/4/131406999/nulenasikatolob-retezowudumi.pdf
    • http://hvnorml.org/uploads/1/3/0/8/130815009/gakezol.pdf
    • http://linkoo.info/uploads/1/3/0/6/130639495/5056069.pdf
    • http://newwaveproperties.net/uploads/1/3/1/4/131406480/6796795.pdf
    • http://opcgivethegiftofart.com/uploads/1/3/0/2/130271255/c00ed02edb1a.pdf
    • http://discoveryelectricbikes.com/uploads/1/3/1/4/131406741/8465712.pdf
    • http://beatslb.com/uploads/1/3/0/7/130739463/natusatabotim.pdf
    • http://vaultingcougars.com/uploads/1/3/0/7/130738960/xozed.pdf
    • http://everestcapitalsolutionsinc.net/uploads/1/3/0/4/130476632/gutazibupezenaxamaw.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_off00007011.bin
e4c4206ac4808138f771115e60c98bc7703d7f4105e7e273ef1fcd845d4873f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7011 8656 bytes
font_01_sfnt_off0000914a.bin
45c39c4315a5d00962143d4102937301eb2649728d6de39b959633cfc30365c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x914A 16144 bytes

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