Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbca160061d4eb15…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 14:27:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fdaf394f66a516105b65dba2acf69d1c SHA-1: 61aeece5c5de3ac88df46c5a5077e9f0bf684fff SHA-256: bbca160061d4eb15c26c793fe603bd4d07678d54a14e8715ad55d9182841cecc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, including one that masquerades as a 'free generator / game hack'. The document body and embedded links suggest a lure to download further malicious content. While no scripts were explicitly extracted, the nature of the links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/431946152/watch-videos-for-robux-game-hack In PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/tiktok-likes-free-2021_GM835599320.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/roblox-toy-codes-free_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/free-tiktok-fans-no-verification_GM835599320.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/get-robux-today_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005064.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5064 24720 bytes
SHA-256: f7e96a46231473b5531a5df6dbd12db7214e41e4b452f06900908643af5be2d8
font_01_sfnt_off000088a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A4 2832 bytes
SHA-256: 78e89c8f621d90011ffb7a2107d701d4cdf090a2f2cf42d5a65297289afc8805
font_02_sfnt_off00009255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9255 19140 bytes
SHA-256: 301f4b72018bde41591ea9383aea6da8578dd4e8b92e993503a568e91431ca36

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