Malicious PDF — malware analysis report

Static analysis result for SHA-256 73504f87a4392808…

MALICIOUS

PDF

35.2 KB Created: 2021-06-28 07:17:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: bffb57099d34cebf6076f28dbd6786e5 SHA-1: 482bd4b2461a56ee75edfabeda662fa764bd9455 SHA-256: 73504f87a4392808afd09ca88af260a888af8677156b82f0689433db4ebb8a04
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text lures related to "robux hacks" and "game hacks", directing users to potentially malicious websites. The primary URL, http://netcdn.co/app/431946152/robux-hack-no-human-verification-and-no-survey-game-hack, is flagged as a known malicious redirector. The document's content and embedded URLs strongly suggest a social engineering tactic to trick users into visiting malicious sites, likely for further malware delivery or credential harvesting.

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/robux-hack-no-human-verification-and-no-survey-game-hack In PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/battle-royale-hacks-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/pokemon-go-free-roam-hack_GM1094591345.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/granny-roblox-games-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/comment-avoir-des-robux-gratuit-hack_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/cheat-engine-roblox-weight-lifting-simulator_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.akperkabpurworejo.ac.id/repository/how-to-hack-surf-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/real-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/pubg-uc-vpn_GM1330123889.pdfIn PDF document text
    • http://digilib.akperkabpurworejo.ac.id//repository/minecraft-bedrock-client_GM479516143.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_off00003140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3140 22076 bytes
SHA-256: a6ca40be6069da883dc5cd94545d009ca64f3a7453cf55100f67bebbb58462cb
font_01_sfnt_off00006224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6224 19808 bytes
SHA-256: 027405f9a72043b3a6b9739236d21e2b5a31537e4b2811b663f504909a0bc66f

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