Malicious PDF — malware analysis report

Static analysis result for SHA-256 f098d6e14932db1b…

MALICIOUS

PDF

49.8 KB Created: 2021-06-04 00:06:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: afb14b7a4813d4c11d82d13c30359dd5 SHA-1: bd41257d10e03aa222fb38b5f979b0f9295523f6 SHA-256: f098d6e14932db1b0ca0213d6e6002e7279c4bddd33e691756cc65ce7982d2a7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a document body that lures users with promises of "free promo codes for Robux" and "game hacks". The ML classifier flagged this PDF as malicious with high confidence. The presence of embedded URLs suggests an attempt to redirect users to malicious sites for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9751

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/free-promo-codes-for-robux-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/pubg-uc-60_GM1330123889.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-monster_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-pokeballs-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005194.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5194 24076 bytes
SHA-256: d47d9953c1a715fb820299e4e7fdb50b90605381d6b905f457f8263f18621178
font_01_sfnt_off00008881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8881 2828 bytes
SHA-256: a4e15770ab3b920ccbab17816ac2be280610f3f789d7654b00721cdcc5d65b79
font_02_sfnt_off00009231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9231 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off00009ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED9 18604 bytes
SHA-256: f71c03fba91376071fb946d88a6d16afcc2c6d61aa4ef632c3571b6200829f5d

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