Malicious PDF — malware analysis report

Static analysis result for SHA-256 22747b28ebad3d59…

MALICIOUS

PDF

34.6 KB Created: 2021-06-27 20:49:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fb5c76e6c5f234df184123be3f0784c0 SHA-1: 0e9359afba9fa6c1b5eddb1b87616bfbaac45f6b SHA-256: 22747b28ebad3d5913a6a5312b161ee0b1a4ff1bf2c73e25bd260d50e1755b07
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free robux'. The primary lure URL is http://netcdn.co/app/431946152/how-to-use-roblox-hacks-game-hack, which is flagged as malicious. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites.

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.co/app/431946152/how-to-use-roblox-hacks-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/rxgate-cf-free-robux-redeem-code_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacks-for-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-codes-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-from-your-friends_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/promo-codes-for-free-stuff-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/when-tiktok-free-will_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/musical-chair-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-roblox-codes-2021-may_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-exploits-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/speed-hack-tool-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-items-2021-thumbnail_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
stream_003_off000062d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x62D5 18820 bytes
SHA-256: ac604af3e432b1c23caf2a0960c4ef0fa88027627a920037340df699298131aa
font_00_sfnt_off000030b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B3 22472 bytes
SHA-256: 358e3035da3543efcc2d1e3a36411f47d3f8843db7ebb6753faf234275221e2c

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