Malicious PDF — malware analysis report

Static analysis result for SHA-256 8902393c5e7655d2…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 04:15:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8346e66394fcc43d5cf3b593e2f77a3b SHA-1: 78ec789588c33ce890dfb935ccc81c49fbf75131 SHA-256: 8902393c5e7655d2c61ced59758be7179b5336b8ba349a28b64e25447607ed2f
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA and a download button lure, directing users to a URL associated with game hacks and generators. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs suggest a phishing or scam attempt. No scripts were extracted, but the document's structure and content indicate an attempt to trick users into visiting a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-private-server-roblox-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/pubg-uc-on-discount_GM1330123889.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/robux-page_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/pokemon-go-free-4k_GM1094591345.pdfIn PDF document text
    • http://192.168.0.99/%20%3Cp%3E%3Cp%3ERoblox%20Noclip%20Hack%202017%20Download%20Americabitching%20Com.%20Speed%201.%20Roblox%20how%20to%20speed%20hack%20in%20any%20game.%205%20movie%20clip%20boarding%20the%20bus%201994%20hd%20speed.%20Roblox%20live%20group%20member%20count.%201994%20full%20movies%20english%20speed%202%205.%20Roblox%20annoyed%20face.%20Movie%20clip%20jumping%20the%20gap%201994%20hd%20speed%20hack.%3Cp%3E%3Cp%3Eredline%20roblox%20hack%3Cp%3E%3Cp%3EMad%20City%20Roblox%20Wikia%20Fandom%20Powered%20By%20Wikia.%20Vending%20Machine%20T%20Shirt%20Roblox%20Free%20Robux%20Offers.%20How%20To%20Get%20Free%20Robux%20In%20Prison%20Life%2020.%20Roblox%20Hack%20Prison%20Life%20V20%20Free%20Robux%20Denis.%20Videos%20Matching%20Fake%20Bot%20Troll%20Roblox%20Prison%20Life%20Revolvy.%3Cp%3E%3Cp%3Efree%20robux%20site%20no%20survey%3Cp%3E%3Cp%3Erobux%20hack%20inspect%3Cp%3E%3Cp%3EHow%20to%20upload%20audio%20to%20roblox.%20One%20of%20these%20ways%20is%20through%20the%20use%20of%20audio%20which%20players%20can%20add%20to%20their%20places%20as%20background%20music%20narration%20sound%20effects%2025%20Best%20Roblox%20Meme%20Song%20Id%20Memes%20Loud%20Memes%20Codes%20Memes.%20How%20To%20Get%20Free%20Faces%20On%20Roblox%202019working%20Promo%20Code%20Roblox.%3Cp%3E%3Cp%3EHow%20To%20Make%20Your%20Roblox%20Avatar%20Cool%20For%20Free.%20Videos%20Matching%20All%20New%20Strucid%20Codes%202019%20Giveaway%20Revolvy.%20Roblox%20Hackers%20Names.%20Roblox%20Gift%20Card%20Giveaway%20Free%20Robux%20Robloxgiftcard.%20Roblox%20Ninja%20Animation%20Code%20Roblox4allhack.%20Roblox%20Edgy%20Outfits%20Free%20Robux%204%20All.%20Roblox4allcool.%3Cp%3E%3Cp%3EHowIn 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
stream_002_off00005408.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5408 23640 bytes
SHA-256: 2952ab285b411c196e366001b1bd229d9ba5e0f6026199b9b06943a31bdb3ea1
font_01_sfnt_off000089a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A8 17900 bytes
SHA-256: 1306b8979cf0dda10fbb7b32508dd78691399c3c8361710310129cc3e8c56024

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