Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b8c4da46053610…

MALICIOUS

PDF

36.2 KB Created: 2020-04-04 16:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0561dfb2688e2ea7b903a1b6b191af4b SHA-1: 40c78c4fc6cef9f7b79b8798977247c3d62af57a SHA-256: a2b8c4da46053610c4d1267076be2a21d446fe67e4b9609d6685145e4aabf586
70 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains. One of these links, http://michaelshusko.com/uploads/1/3/0/5/130551739/130551739.html#ivms+4200+for+mac+download, is presented as a download for 'Ivms 4200 for mac'. This suggests a social engineering lure to trick the user into downloading a malicious file. The heuristic PDF_SEO_LINK_FARM indicates a pattern of generating numerous links, likely for SEO manipulation or to host multiple malicious payloads.

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://michaelshusko.com/uploads/1/3/0/5/130551739/130551739.html#ivms+4200+for+mac+download
    • http://sandsmcfie.com/uploads/1/3/1/3/131383604/diguzeg.pdf
    • http://bravofm.org/uploads/1/3/0/7/130740563/lasadogajat-vuvuzalorafemu-nolorogi.pdf
    • http://yeovilbeekeepers.org/uploads/1/3/0/5/130539843/d6d0f877.pdf
    • http://aqua-straw.net/uploads/1/3/0/6/130639949/sixekaruru.pdf
    • http://luxuryinfusedtreats.com/uploads/1/3/0/6/130604250/8478893.pdf
    • http://workingtowardzero.com/uploads/1/3/1/4/131408068/texokadelelet-gogimib.pdf
    • http://jessrledd.com/uploads/1/3/0/4/130488626/fee3bd508e0.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_off000065b2.bin
feb6e5820407a77d51973c76548852670057fb1d5990d0067c5fd4c26a24fc89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B2 7964 bytes

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