Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b16077047d1a1fb…

MALICIOUS

PDF

37.6 KB Created: 2020-05-23 10:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f28962c3121747efa1c367e8b70ab7d SHA-1: bde54d56cb9a713866a192e23c1d278923d11759 SHA-256: 3b16077047d1a1fb7a4c0cc2f791bb2380d74b898b87399988fb39b2425f9fc6
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to uniquely named PDF files on various domains. This suggests a link farm or a method to distribute content across many sites. The primary heuristic firing indicates a 'PDF_SEO_LINK_FARM' with a dominant host of 'airductcleaningrochesterhills.com', and the document body contains the URL 'http://type1cyborg.jacquelineclewis.com/uploads/1/3/1/6/131637240/131637240.html#the+canon+debate'. No scripts were extracted from this sample, limiting the ability to determine further malicious actions.

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://type1cyborg.jacquelineclewis.com/uploads/1/3/1/6/131637240/131637240.html#the+canon+debate
    • http://airductcleaningrochesterhills.com/uploads/1/3/0/2/130288710/rabami.pdf
    • http://aaronlevineaudio.com/uploads/1/3/1/8/131871744/naxepizuvit-karurezi-nekulovamalola.pdf
    • http://cowsunleashed.com/uploads/1/3/0/6/130620791/xezebelobujozuzos.pdf
    • http://rejuvenationdesign.com/uploads/1/3/1/6/131606069/tekemukake-nofimove-tosaxagebi.pdf
    • http://valedetoxclinic.com/uploads/1/3/1/6/131606803/nukefolewakaz-mitujivetivega-lexos-saporu.pdf
    • http://consaborinc.com/uploads/1/3/0/8/130815664/kuvop-wowogototaj.pdf
    • http://jperealty.com/uploads/1/3/1/3/131379409/9519363.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_off000067b7.bin
cbf13957ab1cda51ad05b8ae0a7229341d7529e5dd64aa430ecae3086fa3b807		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B7 10648 bytes

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