Malicious PDF — malware analysis report

Static analysis result for SHA-256 57584ad3f29982da…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 22:21:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c2cccc7486a631cccb696da1891b1a26 SHA-1: 0b7941f21f8b8a0e0abd4ae96d50aea51ce418bc SHA-256: 57584ad3f29982daa5b122484648edf3e68c9863c51e0eb1821f423efb159892
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to a known malicious URL. The document body, though partially garbled, includes text related to 'Roblox Studio Free Download' and the malicious URL. The ML classifier also flagged this PDF as malicious. The embedded URL is likely intended to lead the user to a malicious site for further compromise.

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.online/app/431946152/roblox-studio-free-download-game-hack In PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master--hack_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/how-to-hack-roblox-2021_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_off00004f1e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F1E 24412 bytes
SHA-256: 227304f8af899e7fcfc0f0e404b62a3a77dc0941bbebac6e776db6ace60d72b9
font_01_sfnt_off000086cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86CB 19048 bytes
SHA-256: 285731f73243192995ef55c7bff5b12d0277a9b461a1d4b1bbd56785699d0c43

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