Malicious PDF — malware analysis report

Static analysis result for SHA-256 b74a09bccaca7010…

MALICIOUS

PDF

46.2 KB Created: 2021-05-10 17:01:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f333d3f5dde3804d58f5fa1134615cb2 SHA-1: e9d0c62383ba19bf503fa3521b1ba20727acf463 SHA-256: b74a09bccaca7010e92a7b319773a941c4c781ac099db07faa421d722c95eb6f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free spins' to lure users. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary malicious activity observed is the redirection to potentially harmful websites, likely to deliver further malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9278

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/406889139/coin-master-free-spins-and-free-coins-game-hack In PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/cpbildco-robux_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning.ma-malnupusatmenes.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BFF 25284 bytes
SHA-256: dfcf0c61fc39829beb46f288e6d4409dda2e7cec3b968e5e742335258cffab29
font_01_sfnt_off0000866b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866B 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off000092f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92F0 18060 bytes
SHA-256: 7f8980b6f3213b204c7b050e62c653166806b65682437d624869b2fc7a4cb6a7

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