Malicious PDF — malware analysis report

Static analysis result for SHA-256 efc6ac5156a71cd0…

MALICIOUS

PDF

45.9 KB Created: 2021-06-04 10:07:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9206636a0741ca611bd572c46364e1aa SHA-1: 6aedf7393cf321092d34ca60c9ed323762657aaf SHA-256: efc6ac5156a71cd02a9401866d9c18edc356e678cf494638070bae8d56bacb98
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, directing users to a malicious URL. The document body, though truncated, contains text related to 'free Robux' and a URL that matches the heuristic. This indicates a phishing attempt to trick users into visiting a malicious site, likely to download further malware.

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/how-mto-get-free-robux-easy-game-hack In PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/jailbreak-script_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/roblox-hutt-cartel-tatooine-free_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/free-roblox-injector_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/roblox-dungeon-of-quest-code-cheat_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/what-is-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-man2jakarta.com/__statics/gudangsoal/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.micIn 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_004_off0000543e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x543E 26132 bytes
SHA-256: 78f136d67868ec1f8dc0842ac128c4f23a7745548e332b89af1ade7ba38cbc4b
font_01_sfnt_off00008ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED1 18888 bytes
SHA-256: 6acc4fa0ecfe64b1f1f7375622381fca576d7946e4f9f9668e4feca822e88532

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