Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc20fb38bdbb180…

MALICIOUS

PDF

37.1 KB Authoring application: Karbon
MD5: 84c89de23126f83d3d74662700abd496 SHA-1: 113f0613ef97571d9ac69680bb33dd9da9c9b93e SHA-256: dbc20fb38bdbb180609b40f3ef1bb5375c5dd63996ace58051475e764540fc81
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic and ClamAV detection. The document body itself is heavily obfuscated and contains some of the same URLs, reinforcing the malicious intent.

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://minnehahalawns.com/uploads/1/3/0/5/130550967/5dabdfad99a8.pdf
    • http://takimus.tbrd.tech/uploads/2020/01/29/7f7202526de.pdf
    • http://tourstotheisleofskye.com/uploads/1/3/0/6/130604419/7d2e9b75ed298.pdf
    • http://mpassociatesrealtors.com/uploads/1/3/0/5/130589014/089c691d4.pdf
    • http://mysterytomb.com/uploads/1/3/0/6/130639382/8358724.pdf
    • http://budsmotorauctions.com/uploads/1/3/0/2/130288915/gabagarifulan_tunuvepijiwujus_berimaf.pdf
    • http://andrewgibson.ie/uploads/1/3/0/4/130488387/2602323.pdf
    • http://growlingsteph.com/uploads/1/3/0/7/130775725/6723817.pdf
    • http://mgpl-maa.com/uploads/1/3/0/5/130590030/5664066.pdf
    • http://ravenheim.net/uploads/1/3/0/5/130543070/sabanikuvurubewi.pdf
    • http://abettertravelagency.com/uploads/1/3/0/7/130739037/senebevokeguw.pdf
    • http://blockchainambassador.ca/uploads/1/3/0/7/130775858/130775858.html#transformational+leadership+definition+google+scholar

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012ac.bin
396cb45f3f218eb8825036c7d2855b692cbe1b14d991186f12faa15fd083e716		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC 7676 bytes

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