Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd063a3b6401539…

MALICIOUS

PDF

42.6 KB Created: 2021-05-13 12:02:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0e5044e2fef05d6c656429fee9482311 SHA-1: f151c32513fe88c7982b8d7dab9f2e867d6ae6b9 SHA-256: 3dd063a3b6401539f5ff4f4ee3dc3b5bad5ceb52ade2df67208579140dde081e
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a link farm, directing users to websites that promise free virtual currency or game hacks. The ML classifier strongly indicated maliciousness, and the presence of multiple external links suggests an attempt to redirect users to potentially malicious sites for phishing or scam purposes. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://netcdn.xyz/app/431946152/free-robux-no-verification-2021-game-hack PDF link annotation
    • http://pa-bengkulukota.go.id/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/rbx-robux_GM431946152.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/robux-in_GM431946152.pdfIn PDF document text
    • http://pa-bengkulukota.go.id/images/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B7 28140 bytes
SHA-256: f7e93219b2330a7244a90196ddc67fbdcd9851fb1fa480f2cc653d45781f33c9
font_01_sfnt_off000088be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88BE 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139

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