Malicious PDF — malware analysis report

Static analysis result for SHA-256 6065d6fef44b9771…

MALICIOUS

PDF

46.6 KB Created: 2021-06-09 14:37:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c632a4453d544dafac109609a95b1e4a SHA-1: bfa44e5705330a35ca40c88d67320d88a8501ac2 SHA-256: 6065d6fef44b9771cfff8affaa61277da4941cbebbe9dd863321e35b138e2c46
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising a 'Roblox Jailbreak Money Hack'. The document body, though heavily obfuscated, contains references to this hack and the redirector URL. This indicates a social engineering lure to trick users into visiting malicious sites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/roblox-jailbreak-money-hack-2021-game-hack In PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/code-for-roblox-hack_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coun-master_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-robux-2021-easy_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
stream_004_off0000521d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x521D 28032 bytes
SHA-256: 29e926f505a2676e185e96dd34277ede85eb1198191688efc244cbd1b9ec6aaf
font_01_sfnt_off000090b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B4 19244 bytes
SHA-256: 7231245a0d29a459ae2987375e036450a6dcc097c16cd245166a12a1a1ef4ff2

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