Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a262999f7a98fa…

MALICIOUS

PDF

43.8 KB Created: 2021-05-13 13:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d9072d8770ad383b9b94479afe28c1af SHA-1: 6515cf9d3174af6a30f2d4904c811dcdbd38c774 SHA-256: 63a262999f7a98fa1610ace12b2a3a3ebccae8fc750f9795befdfb845d69ec58
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for "free Robux" and presents a fake CAPTCHA to trick the user into clicking a malicious link. The ML classifier strongly indicates maliciousness, and the presence of multiple URLs associated with game cheats and generators supports a phishing or scamming attack pattern. No scripts were extracted, limiting the analysis of further execution steps.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/get-free-robux-generator-game-hack PDF link annotation
    • https://dinpertan.grobogan.go.id/images/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/robux-cheat_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • https://dinpertan.grobogan.go.id/images/roblox-com-free-play_GM431946152.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
font_00_sfnt_off00004a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A85 27200 bytes
SHA-256: 0a9b95aca17bed52e693065684ff992ced4dfd837a7d0301cf1ef6135607d803
font_01_sfnt_off000088c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C2 18344 bytes
SHA-256: 3242c4573a8204327cdf084b118e3b23cfd789fa9551ab2d205e53ac9add3c4b

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