Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1cfd4cb5ddc6fa…

MALICIOUS

PDF

35.9 KB Created: 2021-07-03 21:50:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: cd4a54a2b4d2ac0e2292cd6f97f37344 SHA-1: 69faeb669181fdb67d69c3091f342caafbcb6632 SHA-256: 1e1cfd4cb5ddc6fa1101062a939c042cbfa58a82e0b6338fca90a0fe61b2013d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and cheats. The primary malicious URL identified is http://netcdn.tw/app/406889139/download-coin-master-hack-mod-apk-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a malicious intent to redirect users to download potentially harmful software.

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/406889139/download-coin-master-hack-mod-apk-game-hack In PDF document text
    • http://lib.stiesultanagung.ac.id//repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/roblox-cheat-engine-63-mac_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-robux-bettergenerator-us_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/how-to-hack-youtubers-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/how-to-have-infinite-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/roblox-undetected-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/optifine-pe_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-roblox-bot-account-dump_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/best-free-roblox-exploitds_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/roblox-ad-free_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-robux-hack-no-download-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/roblox-dragon-ball-fury-cheat-engine_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_002_off0000348c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x348C 22960 bytes
SHA-256: f590329fc8f95997b130b063f876cbf88d74bff0544cb1e5291961a801cd620c
font_01_sfnt_off00006817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6817 18760 bytes
SHA-256: a9106ec8bdb2ef00eddd29af2fd5eb663302a9539c133b1226910953e26aec8b