Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb491f838f69db41…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 11:49:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5b84725ada6e90be541f588ff390b83d SHA-1: 062832555a9dddba12d292b808169f2752974aae SHA-256: eb491f838f69db41aa9fd5ac6b1512195fa2b5e7005c7ea8f04cebc3d8711d14
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting 'game hacks' and 'free generators'. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary function appears to be directing users to potentially harmful content or further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-free-robux-codes-game-hack In PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/are-pubg-uc-free_GM1330123889.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-18_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/master-coin-free-spin-daily_GM406889139.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
font_00_sfnt_off00005315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5315 26408 bytes
SHA-256: 0d287034a11d1a26a82bec38272f591ac475424b40523f4c93065ee2d5109084
font_01_sfnt_off00008f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F25 18260 bytes
SHA-256: 40a15a9049e9412bdd5c9a35f1903570ad5947e976b8939b833c9d7797e77bf9

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