Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fbecfb901cd14a…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 06:08:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b7a9a2f64db07f1089334b187479d0ce SHA-1: 4c4a29d686949840e0dd702a54cb18642a068783 SHA-256: a1fbecfb901cd14aa8a5f9df08c84248c8f724333e2dc2c2baeae1b7e82a47eb
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple embedded URLs and a primary external URI pointing to sites offering game hacks and cheats. The ML classifier strongly indicates maliciousness, and the presence of these links suggests an attempt to direct users to download potentially harmful content or visit phishing sites. No scripts were extracted, but the document's structure and content are consistent with a lure for game-related exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.tw/app/431946152/how-to-hack-roblox-accounts-2021-game-hack.
  • 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/431946152/how-to-hack-roblox-accounts-2021-game-hack In PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/install-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-no-hacks-or-inspect_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/pubg-uc-dealer_GM1330123889.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-we-are-number-one-hack_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-hack-peoples-accounts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D4E 21768 bytes
SHA-256: 1fe736f9465c755a5ce6c03835b4ed1bb5c203a60a761aeabdfcdaeea7de5c9b
font_01_sfnt_off00005d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6A 19468 bytes
SHA-256: c059e5ce0b13cf3e98c6bfdb87126f354e1dae45520eeb333857e6d2b791b0b8

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