Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b05a2c0494f7fb3…

MALICIOUS

PDF

44.4 KB Created: 2021-06-09 06:09:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4cb2dda84e81eccace9abbd74f5e66f9 SHA-1: b289c9e4f826ea143dfcd12eda6ac31a018fdd04 SHA-256: 9b05a2c0494f7fb315fa97b0da28fa329140b5f17b1c66f83cce9f3eeb362b3a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, disguised as a 'free generator / game hack'. This lure is intended to trick users into downloading further malicious content. The presence of multiple links to similar-themed PDFs on the 'sponajaib.com' domain suggests a campaign distributing potentially harmful documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.
  • 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/como-quitar-no-soy-un-robot-en-freer-robux-game-hack In PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/tiktok-fame-free_GM835599320.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/whats-robux_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/scaciati-mega-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/minecraft-fly-hack_GM479516143.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_off00004f8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8A 24708 bytes
SHA-256: 0280a8d451eb15700af5d589a6e99b9855808f9082d9857d889c50021af8ea5c
font_01_sfnt_off000087e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E4 19252 bytes
SHA-256: 908c103b0143bd155fc206a99ca54f1630aab945f25697a5fd6e2f411da46ded

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