Malicious PDF — malware analysis report

Static analysis result for SHA-256 0770c11e550e01e7…

MALICIOUS

PDF

51.1 KB Created: 2021-06-03 23:27:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: bff194fc333db504420b5ecfd71d5143 SHA-1: 0135039fbb7466ad3ac46a77b7a7cf373f8b61ed SHA-256: 0770c11e550e01e7d1f8eb273be7fd33daa508505d5107316527900a059bbb4f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. The ML classifier also flagged the PDF with high confidence. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9713

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/479516143/is-minecraft-free-on-xbox-one-game-hack In PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/download-apk-tiktok-free_GM835599320.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-lawsuit_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/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005318.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5318 26460 bytes
SHA-256: 7a1cd948e4cb1ceb8a3a9f5fe189500a3bdc330bf8e80a32403b669b2718d381
font_01_sfnt_off00009051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9051 3020 bytes
SHA-256: eedce20c19bed174ebe453a0c0095ca54ef1c0cf763914f699a20348cea05fc2
font_02_sfnt_off00009aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA5 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off0000a4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B6 18304 bytes
SHA-256: 19d9535fd2d352d2586ba99854d4ae80d513f2901e16ae506060a78b50b635a9

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