Malicious PDF — malware analysis report

Static analysis result for SHA-256 a19ea7542575c04c…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 04:30:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f7d02d8e5208ce9a1bc07913ac2807e7 SHA-1: 640f2b73718ee8a238bdaf4374a20ad1b751271a SHA-256: a19ea7542575c04c57e81e4302dcb9bdfead555e97057de54917434243a9ad33
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one that redirects to malicious infrastructure disguised as a game hack generator. The document body and heuristics indicate a lure for free game currency or hacks, aiming to redirect users to potentially harmful sites. While no scripts were directly extracted, the PDF structure and embedded links suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-to-get-coin-master-card-free-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/pokemon-go-free-7-days_GM1094591345.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-link-blogspot_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_004_off000050a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A7 24728 bytes
SHA-256: 45e0b0f8fefb39aeba399b4fff6ba32fb1ede3768f1ff148d46c3de3da2b40c2
font_01_sfnt_off00008933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8933 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off00009b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4C 18048 bytes
SHA-256: e789d2c724ea41351e8c9ce7f7a5de89d28c485623c0379f4ca58ed4adff0f23

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