Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e06d8cae3fe549…

MALICIOUS

PDF

37.2 KB Authoring application: Poppler-utils First seen: 2021-06-13
MD5: 9e673b049a29ec05835636ee16064504 SHA-1: 8f4b4e61c2257492c8afccb1d84fa8bf2a920be7 SHA-256: 78e06d8cae3fe5491aa1a5e2bc13655678e6ca8a916dcbaaa3581c0e5ff05cd6
152 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 hosted on Weebly. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious payloads. The ClamAV detection and ML classifier strongly suggest malicious intent, aligning with the PDF_SEO_LINK_FARM heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gitisupo.weebly.com/uploads/1/3/0/4/130488506/300cef986.pdf In PDF document text
    • https://kasedixosejija.weebly.com/uploads/1/3/0/3/130323318/tarit.pdfIn PDF document text
    • https://rokutubukida.weebly.com/uploads/1/3/0/4/130488829/d82dfa5a30a68.pdfIn PDF document text
    • https://kabenojakuje.weebly.com/uploads/1/3/0/2/130289278/repilurozek.pdfIn PDF document text
    • https://jeninapefazi.weebly.com/uploads/1/3/0/4/130488583/3745288.pdfIn PDF document text
    • https://bigurokirosat.weebly.com/uploads/1/3/0/3/130313015/7111228.pdfIn PDF document text
    • https://sizujeroxa.weebly.com/uploads/1/3/0/2/130272493/tabivabivowapin-mujotajunapu-vunajaxusulo-nijer.pdfIn PDF document text
    • https://rozikunimozos.weebly.com/uploads/1/3/0/2/130272247/kufiwafufigi_rurukibuwaxawed_bibetaj_pujenazeza.pdfIn PDF document text
    • https://kusufakug.weebly.com/uploads/1/3/0/4/130478484/biradugiwirudu.pdfIn PDF document text
    • https://vibokivete.weebly.com/uploads/1/3/0/2/130289782/wurikagisi_wepaxej.pdfIn PDF document text
    • https://pefovonutokokis.weebly.com/uploads/1/3/0/2/130289496/5679098.pdfIn PDF document text
    • https://foxujesijufi.weebly.com/uploads/1/3/0/2/130289799/4018073.pdfIn PDF document text
    • https://vetesobonituzo.weebly.com/uploads/1/3/0/2/130288629/b856769eda3fd.pdfIn PDF document text
    • https://mazulomubogur.weebly.com/uploads/1/3/0/4/130483756/zovem-fesotexaxaxi.pdfIn PDF document text
    • https://fifisazuwas.weebly.com/uploads/1/3/0/2/130289722/pofoziniz.pdfIn PDF document text
    • https://woragofewe.weebly.com/uploads/1/3/0/4/130478347/327272.pdfIn PDF document text
    • https://nasakafawo.weebly.com/uploads/1/3/0/2/130288854/8740427.pdfIn PDF document text
    • https://midesafovod.weebly.com/uploads/1/3/0/4/130483728/130483728.html#english+grammar+tenses+worksheet+pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1485 8008 bytes
SHA-256: 0e0c3f73cc8039c8ea70b589c137cb0877632b6f461d3f93096f4cbd654808db

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