Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf5d82386e527a4d…

MALICIOUS

PDF

36.0 KB Created: 2021-07-04 14:31:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 495a177bfc4e2957f033d59584b2cbdf SHA-1: 70d27ec912e0bfeb85fda4cc6ff83e7d32d8c121 SHA-256: cf5d82386e527a4d7e80666e5754ae2614da08414385ebb41c93d94c80559fad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing indicating it links to a malicious redirector disguised as a game hack generator. The document body and embedded URLs reinforce this lure, directing users to potentially malicious sites. While no scripts were extracted, the PDF's structure and embedded links strongly suggest a phishing or malware distribution 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-tiradas-gratis-game-hack In PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/robux-html-hacks_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/roblox-hax_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/aplicacion-rusa-para-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-to-use-cheat-engine-63-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/cheat-codes-for-roblox-android_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-to-combine-videos-on-tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/roblox-r2da-hacks_GM431946152.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-robux-pastebin-2021_GM431946152.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_002_off000036f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36F7 23100 bytes
SHA-256: c621630ecf51a373942a5b9fa81cb5f8c46885bdfd30c58005d71bf15bb7b460
font_01_sfnt_off00006af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF9 18008 bytes
SHA-256: 26943db6994c8f596f05ac3b4f3dc1d413dbcf08a64b9909b9531db9603e905b

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