Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f93da49804f4f4f…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 21:57:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6cefb28e1ec26f9d785b7929e34ce4cc SHA-1: beb0271c1ff04043a354a02ea47d94cb1bd43490 SHA-256: 1f93da49804f4f4fdf790db5fdc0acf07372a22fc3884ba88179dabb9db38f04
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector leading to a 'game hack' lure. The document body and embedded URLs suggest a social engineering attempt to trick users into visiting potentially harmful websites. No scripts were extracted from this sample, but the presence of malicious links and the lure indicate a phishing or scam attempt.

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/coin-master-invite-friends-hack-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/working-roblox-hacking-dll_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-free-games-without-download_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-no-installing-games_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-not-a-scam_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_off000032d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32D6 23880 bytes
SHA-256: 8db4bddef054442e175370039162b6724165a89f3f5072ae3edb8cbfd4693390
font_01_sfnt_off000068f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F7 18456 bytes
SHA-256: a26d5737dc3e5e06b02edf808e6094a365cb44a0ead87865d2f9109774260649

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