Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5779c6c90ea2274…

MALICIOUS

PDF

41.2 KB Authoring application: Serif PagePlus First seen: 2021-07-10
MD5: 8855a054a9ae314fb7a6516d64fc5435 SHA-1: 5a9c5757ebdac65a50ab8b5c77f9f9b226eabbf7 SHA-256: c5779c6c90ea227474187f5c7161e00ac757a323a9b5b4c67a40499d9889a3a6
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://kude.new-m2.ru/uploads/2020/01/27/madexel.pdf In PDF document text
    • http://taw.lakan.ru/uploads/2020/01/28/liwosezi.pdfIn PDF document text
    • http://nimenefu.kuhni-msc005.icu/uploads/2020/01/28/859178d1a.pdfIn PDF document text
    • https://modejovi.weebly.com/uploads/1/3/0/3/130323110/4c2fffbc87d54a6.pdfIn PDF document text
    • http://geko.ul-net24.ru/uploads/2020/01/27/8898028.pdfIn PDF document text
    • http://suz.tomrich.ru/uploads/2020/01/28/1121492.pdfIn PDF document text
    • https://vegepopabosav.weebly.com/uploads/1/3/0/5/130543276/5703201.pdfIn PDF document text
    • http://charger-apple.ru/uploads/2020/01/27/8561831.pdfIn PDF document text
    • https://gefarotetuf.weebly.com/uploads/1/3/0/4/130483745/takogunaked.pdfIn PDF document text
    • https://vajaxosojubogo.weebly.com/uploads/1/3/0/5/130543351/7e9242b.pdfIn PDF document text
    • http://wama.storeforevery.com/uploads/2020/01/27/c9c9700f1c5c9.pdfIn PDF document text
    • http://bbjgamestore.com/uploads/2020/01/27/luwateferivugogonu.pdfIn PDF document text
    • http://dotataguva.troick-narkologiya.ru/uploads/2020/01/27/9791068.pdfIn PDF document text
    • http://ruziwimiso.n26-logine.com/uploads/2020/01/27/3134861.pdfIn PDF document text
    • http://volgagirl.net/uploads/2020/01/27/mipipubi_rifuwipibebar.pdfIn PDF document text
    • https://kivitezogujukur.weebly.com/uploads/1/3/0/3/130324011/wowibidobikabu-joxuraxefun-lomimusagegedaw.pdfIn PDF document text
    • http://xili.speacetech.us/uploads/2020/01/27/puwerinuxa.pdfIn PDF document text
    • http://kof.knb-games.pw/uploads/64928719.html#emily+dickinson+deathIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1454 8144 bytes
SHA-256: 191b7d5b61bbacfadfa1b3ffa3c6a53c9e8451577375f29b7960ac7c80bee1be
font_01_sfnt_off00005930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5930 16228 bytes
SHA-256: daf5eb4bcf1bd6ce9401dcfc6e8ee2172264857b3d82ddf29cf0b5812521d32d

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