Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fc5ba41d89ea08…

MALICIOUS

PDF

50.3 KB Created: 2021-06-03 23:12:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fe1fd62f99d1c67d7c1d0352e09792fc SHA-1: a86c8f65d590530e2b4448e08334aa0b37a9b01b SHA-256: 62fc5ba41d89ea08cbfc05a5b72583056f2d6e8e0917828cd97bc743da41337d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a URL associated with game hacks and free generators, a common lure for malicious content. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into downloading or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9734

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-free-download-pc-game-hack In PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spins-promo-code_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_off00005533.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5533 24396 bytes
SHA-256: ec2e03ec681358b8df5c947f7579cd6c2cd1eb421722c7d5dbd36725cd444535
font_01_sfnt_off00008cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB5 3020 bytes
SHA-256: eedce20c19bed174ebe453a0c0095ca54ef1c0cf763914f699a20348cea05fc2
font_02_sfnt_off00009709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9709 2816 bytes
SHA-256: 4555740682277f0055d57b15bd0ba953e5b51415ea3d21c93db391eace072d4f
font_03_sfnt_off0000a11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA11A 18444 bytes
SHA-256: 064b6ae6fa3971595f13ccf6914158de219c664ec1a7cfca763d46b46d8283c4

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