Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab4ff63fb872cddd…

MALICIOUS

PDF

42.8 KB Created: 2021-05-14 17:11:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 233f6eacb1e4a91a843cd73b87e71b27 SHA-1: 565cb1ccba503ba30a725f801b402d890185ac99 SHA-256: ab4ff63fb872cddde6513f1df254b8946f3535513995bfad4e8977c57f3f4645
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, with one prominently identified as a malicious redirector leading to a 'free generator / game hack' lure. The document body, though partially corrupted, contains similar URLs and text suggesting a scam. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-daily-free-spins-hack-game-hack In PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/minecraft-free-school_GM479516143.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • https://www.elearning.madarulihsansamarinda.sch.id/__statics/gudangsoal/files/free-spins_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
stream_003_off00004c73.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C73 24768 bytes
SHA-256: 3ee3c5668e9c77a9eac5154e771392fabcdb1a00845214c4965379b99bc265c8
font_01_sfnt_off00008498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8498 18476 bytes
SHA-256: c2f5b1848ff169b31c97a42ada7a437145dc26f40c6d7c3b53e9420ed4832cc1

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