Malicious PDF — malware analysis report

Static analysis result for SHA-256 930ac2febbe249df…

MALICIOUS

PDF

45.4 KB Created: 2021-06-08 18:49:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: de01526cb4a1aa342ecceb51006f53fe SHA-1: 72e62b6b1c0ac77b7a6fa779291a163f1a413d98 SHA-256: 930ac2febbe249df7849f2e8386f9f81c8815fcb23e3ed2cf0dddd41106ac917
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to known malicious redirectors and an IP address, masquerading as a "free generator / game hack" lure. The embedded document body, though heavily obfuscated, contains URLs consistent with this lure. The primary goal appears to be directing the user to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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.tw/app/431946152/roblox-champion-shirt-free-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-robux-on-roblox_GM431946152.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/tiktok-free-watermark_GM835599320.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-hack-no-human-verification-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-inspect-element-cheat-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/make-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-100-spin_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_004_off000051c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C2 25356 bytes
SHA-256: b15656ccbdc0c3b3aa6cba9d13b49fc1632ead1b5bbe02af1599514fdfbff9e7
font_01_sfnt_off00008ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCD 19000 bytes
SHA-256: 2fe781dead90c455d72c8540aabb4f48f678d68dd12a0c4594d86dd3c5634748

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