Malicious PDF — malware analysis report

Static analysis result for SHA-256 91df6cafd20a54bf…

MALICIOUS

PDF

43.3 KB Created: 2021-06-03 06:33:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b036d8cc4e57b2d51b57410e8d8a471c SHA-1: 69dfd4b6e59fdffddcb0d906879318ba636b2cfe SHA-256: 91df6cafd20a54bff6b3751dbe8489dae260428cb35975853718f4c302efcf9a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link that redirects to a malicious website, identified as a game hack lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/free-games-coin-master-game-hack In PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/free-roblox-level-7-exploiter_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://kpu-badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021-hack_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
stream_004_off000051df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51DF 23660 bytes
SHA-256: 8a8802747bf8c76f5b9fe67482e70a941f896bfe305e9e2430f1bf1d612b450a
font_01_sfnt_off000087c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C1 17968 bytes
SHA-256: 5fada2ff63ba62223632bc56e8dfb1643a49e6b45897fd934634a5dc4cc15e02

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