Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cbb1db6033ab630…

MALICIOUS

PDF

44.9 KB Created: 2021-05-16 15:34:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a6cd99ecb9594ab4d9d132a22f9448c9 SHA-1: 30d48166a5413b61fb10cad87f22bc32824df151 SHA-256: 5cbb1db6033ab6303ef499f7a9e9a906d4bb7934c89861cb300b87a52a8172ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier strongly flagged this PDF as malicious, and the presence of a visual download button further supports a deceptive workflow. No scripts were extracted, but the primary attack pattern involves social engineering through deceptive content to redirect users to malicious sites.

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 https://netcdn.xyz/app/431946152/robux-free-c-game-hack In PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/best-hacked-client_GM479516143.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://elearning.min21jkt.sch.id/__statics/gudangsoal/files/hack-coin-master-for-android_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_003_off00004df3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF3 28192 bytes
SHA-256: 75166f04f4da398e460c6b76cc3cfee04530c88f132ab1675d0f23ffdd927a34
font_01_sfnt_off00008e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1E 18012 bytes
SHA-256: 3f1ded8a9c51e4f0f41c660fd84d3573ebe8f92a83837bcaa523a9614d650e73

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