Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb0736b377b654b…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 06:51:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4061ef474d790ce072a2c46c21cb2b82 SHA-1: 2d2330d0b4894702676f38b14a85a587f794afc0 SHA-256: 4bb0736b377b654bfd935f4de9a74f49d99fca7b306181cc263e64ef6730ead3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free game hacks' or generators. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an attempt to lure the user to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/minecraft-launcher-free-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-monster_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • https://freegiftcodes.euIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000532f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x532F 30312 bytes
SHA-256: 593c7a4c29478ec73f1857ae91ddba3618059173afcf19f642970ad67a852cac
font_01_sfnt_off00009243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9243 2840 bytes
SHA-256: 20e88e247102f07c6a70b4d36c7da419714b68793fc4cb00c42292950da9c9bb
font_02_sfnt_off00009c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C00 17872 bytes
SHA-256: d837b145e961d25029e35f3a46fce907c35d402980f977a4958a38d6468d5501

Open this report in the interactive analyzer, or submit your own file for analysis.