Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2de78ce51fded2…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 22:07:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c6e224eb8be031c7bd10fdbd399221ea SHA-1: 499ed7c8b3d0668c93f62e714f9a9ce20fbaeea6 SHA-256: 7b2de78ce51fded214f5415a3d0973b9271cee42d6831b322bd39bc47279bc9f
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free game hacks and fake invoices, directing users to a known malicious redirector. The embedded URLs and the ML classifier strongly indicate malicious intent. The document body and embedded URLs suggest a phishing or scam attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/479516143/minecraft-svg-images-free-game-hack In PDF document text
    • http://lib.teknik.unimal.ac.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/ww-roblox-come_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/pokemon-go-free-dragonite_GM1094591345.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/blox-supply-free-robux_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_off0000536f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x536F 25628 bytes
SHA-256: 31bd45776cfc6cc3b1808b21f26072a901a5a3f4c95c186f8fb39e203eacb73d
font_01_sfnt_off00008db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB7 18232 bytes
SHA-256: a09b643334d2e6be4f3f41432578bfd2746235ab347d952591db22e0a7ac2c60

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