Malicious PDF — malware analysis report

Static analysis result for SHA-256 62590923dc1bf7b4…

MALICIOUS

PDF

36.0 KB Created: 2021-07-04 17:57:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3d44a97a25fe258e9fe399345e3ec35e SHA-1: 6a81c8a87ed312597c5c90f6cfb6cb92d75a091c SHA-256: 62590923dc1bf7b400505463494e762a11a1500a65346a09c619d06707d742a6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body and embedded URLs reinforce this, presenting a deceptive offer for free game currency or hacks. The ML classifier also flagged this PDF with high confidence, indicating malicious intent.

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/get-tiktok-followers-free-game-hack In PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/easy-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/robux-inspect-hack_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-using-inspect-2021_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/www-coin-master-hack-xyz_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_off000035e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35E4 23156 bytes
SHA-256: b56c60766350497aa290276ff1c838914d45809cf9cfa9904bc4236cf1314ce0
font_01_sfnt_off00006a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A30 18208 bytes
SHA-256: 2c913cd2b1a0bf54f87f8719ad814203ec2f1a1a3b8e3f6b6a76b442a86e84f4

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