Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcdafc7de5543bb…

MALICIOUS

PDF

37.1 KB Created: 2020-03-25 05:36:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0554e59efeb4d629a0fa3c8c7cbe59f6 SHA-1: 0da5d9ed16cc42f3446e077c9ca336db2ba83e45 SHA-256: bbcdafc7de5543bbbbcf1edd495340dbc8322957ffb9f3ad80c2d8441a3c6d75
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files on various domains. This behavior is indicative of a link farm or SEO manipulation tactic, designed to drive traffic to potentially malicious or low-quality content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://leavenworthinterfaith.com/uploads/1/3/1/3/131379221/131379221.html#krispy+kreme+original+chocolate+glazed+calories
    • http://placeandpurpose.com/uploads/1/3/0/2/130270937/6159945.pdf
    • http://nashvillecharityball.org/uploads/1/3/0/9/130969472/4137579.pdf
    • http://curtisalmond.com/uploads/1/3/0/6/130621149/1676392.pdf
    • http://www.recyclelaw.com/uploads/1/3/0/5/130550698/kagowutujiwi.pdf
    • http://bradleyspc.com/uploads/1/3/0/2/130288589/ab076ffc7485f8.pdf
    • http://rogueschooling.net/uploads/1/3/0/6/130620460/7632719.pdf
    • http://sunpeakssugarsalon.ca/uploads/1/3/0/5/130539408/zewexixonededuwido.pdf
    • http://beyondlimitlesspossibilities.com/uploads/1/3/0/6/130639941/f51788a2d50b5.pdf
    • http://www.chemohappysacs.com/uploads/1/3/0/6/130604826/395b7205876.pdf
    • http://cocktailsnponytails.com/uploads/1/3/0/3/130312980/8184447.pdf
    • http://mx.cjsclimbandplay.com/uploads/1/3/0/3/130313086/7423559.pdf
    • http://www.saugatuckboardreelect.org/uploads/1/3/0/6/130603873/6798354.pdf
    • http://www.tiferetmiami.com/uploads/1/3/0/8/130814208/wavowoba.pdf
    • http://givinghopetothehopeless-org.rpjandco.com/uploads/1/3/0/6/130621293/lulufojulifu_kilitofajepedup_divowelez.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_off00006812.bin
e074a71d74e6a34e3424a4b83eaeb4c7dcec14121c57ba3013c8930976707000		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6812 8020 bytes

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