Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8254dcf5efa3423…

MALICIOUS

PDF

32.8 KB Authoring application: Mobipocket Creator
MD5: 95c2532c79c235fbb7bc6bb6a92d1edf SHA-1: 7c7e26393562e1433a85fa2d6489c56b52f88f7d SHA-256: c8254dcf5efa3423c8b8706c0cac1b8e66f8c1106d277893735eeaf3415969f1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to direct users to other malicious PDFs, masquerading as educational material. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly suggests a phishing or traffic redirection campaign. The embedded URLs are indicative of a content-driven lure to download further malicious content.

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 https://luwusenar.weebly.com/uploads/1/3/0/5/130589036/421127.pdf
    • http://stanfordlinzey.org/uploads/1/3/0/4/130490875/tuwikejenixe.pdf
    • http://3musesworkshops.com/uploads/1/3/0/5/130544072/eb75ef8.pdf
    • http://theego.org/uploads/1/3/0/6/130604678/rakazamisirakin.pdf
    • http://corridormanchester.com/uploads/1/3/0/2/130270776/8258150.pdf
    • http://topniceshop.com/uploads/2020/01/28/kenaredawim.pdf
    • http://mommymouth.com/uploads/1/3/0/6/130603842/7609652.pdf
    • http://6foot7dave.com/uploads/1/3/0/2/130288761/nuwiguta.pdf
    • http://camphopeless.io/uploads/1/3/0/5/130589315/sofokonufutanutima.pdf
    • http://meshayla.com/uploads/1/3/0/6/130639786/130639786.html#guia+santillana+4+grado

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011b3.bin
eb6d07153628995f61cdc365286a074617e33cb2757d9b08eeea28890cc1f3fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3 8628 bytes

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