Malicious PDF — malware analysis report

Static analysis result for SHA-256 b504bf47e86e3133…

MALICIOUS

PDF

35.4 KB Created: 2021-07-07 23:02:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c7ab3d8e3c5c29b78045b2881fe69a90 SHA-1: 6a22ef672604de04dd8896c462d8d3c74ae608f2 SHA-256: b504bf47e86e3133dc759f4bcefa12132f750a8dbea2be7197ff4de756fe50ae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links, including one identified as a malicious redirector pointing to 'http://netcdn.tw/app/835599320/tiktok-free-followers-generator-game-hack'. The document body and heuristics indicate a lure for game-related hacks or generators, a common social engineering tactic to entice users to click malicious links. The ML classifier also strongly flagged this PDF as malicious.

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/835599320/tiktok-free-followers-generator-game-hack In PDF document text
    • https://razredna-nastava.net/files/10-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-hack-today_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/promo-codes-hack-on-roblox-gives-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/pastebin-roblox-vip-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-eye-poppers-free-hack_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/get-free-robux-codess_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/cheat-engine-and-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-how-to-get-free-paid-games_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33D8 23184 bytes
SHA-256: 9485d5fee8d7ef43799fb31c22c9a824b4cc6f79a671e3c1240feececadbff81
font_01_sfnt_off000067ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67EE 18208 bytes
SHA-256: edf82ae4a9f4d3eecda1b0abe3685b85b09ff2bb093dabd5138a5516c637ddc6

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