Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bab2d8d74abd41…

MALICIOUS

PDF

35.1 KB Created: 2021-07-02 08:53:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4f64d2ddca4d4cc93bda702fd968218f SHA-1: 7c51fc00c2981f951f32875510cbdfe0c6c3871d SHA-256: a8bab2d8d74abd41d0af15b4ea87f87c4a4f2d58f013ba00525e95c7754ec17b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors, disguised as 'free generator / game hack' lures. The primary redirector URL is http://netcdn.co/app/431946152/irobux-com-redeem-game-hack, which likely leads to further malicious content or downloads. The document's structure and embedded links strongly suggest a phishing or scam attempt to trick users into visiting 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 http://netcdn.co/app/431946152/irobux-com-redeem-game-hack In PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-ipad_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/free-swoosh-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/username-and-password-roblox-free_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/check-crashed-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/roblox-cheatus-limited_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/roblox-hack-robux-420-apk-az_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/how-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/march-18-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/coin-master-map_GM406889139.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/100-working-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://elearning.alanwar.sch.id/__statics/gudangsoal/files/free-coins-coin-master-link-today_GM406889139.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_off000031af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AF 22572 bytes
SHA-256: 3bd51be1193b45d0dc456f92d5e10f511c3c27736d0d0e0881b83b77ef520e3c
font_01_sfnt_off0000646b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646B 18984 bytes
SHA-256: 3092244d0a1d8d31e214692ced1a7bb731a37a133b66d247b830125ce136ec68

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