Malicious PDF — malware analysis report

Static analysis result for SHA-256 357d905fdc7d550c…

MALICIOUS

PDF

34.6 KB Created: 2021-07-03 19:34:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ce6ddbdcbd23c3c0b2e15badc3272b0d SHA-1: 3bd535266b07812f2462cd7818b847e4cf4fb970 SHA-256: 357d905fdc7d550ca4ad01242cd8e3173e9b492956cabf31e34f64f8ef4ccd7f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.tw/app/431946152/robux-link-game-hack. This redirector is presented as a lure for game hacks and free currency, aiming to trick users into clicking. The document's structure and embedded links suggest it is designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/robux-link-game-hack In PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/how-to-get-sentry-in-all-out-zombies-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/roblox-cheats_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/roblox-svg-free_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/spare-api-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/urbx-club-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/cheat-pour-mad-city-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-stuff-2021-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/roblox-hack-codes-2021_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://elearning.miislamiyahrgj.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download-2021_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
font_00_sfnt_off000030cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CD 22504 bytes
SHA-256: 56b3ae9227b8eade9b5009036289e585b120ffc317457534ce96f971f7534c93
font_01_sfnt_off000062f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F5 18840 bytes
SHA-256: aa9a69bfc4a7eb4530b09bdaf41a4ce45b1540b6647b6d4f7e18d7f0f2b458ff

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