Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5915da1359b9ca…

MALICIOUS

PDF

34.6 KB Created: 2021-06-29 06:27:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 28abd384c22a35f0210e02df784ce41d SHA-1: 2ee51f40536dc99defbc48605850142d4872b8e4 SHA-256: de5915da1359b9cadd4c3418826f0884b71f74b46e70d6cdc76ef4f7cbfea5b9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free Robux'. The document body and heuristics indicate a lure for users interested in obtaining in-game currency or cheats, which is a common social engineering tactic. The ML classifier strongly supports the malicious nature of this PDF.

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/how-to-get-free-obc-and-robux-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/be-my-baby-break-free-mashup-roblox-id_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-accounts-2021-with-pin_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-para-tener-dinero-infinito-en-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/synapse-hack-roblox-murder-mystery_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-do-hack-your-money-on-roblox-ultimate-driving_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-esp-hacks-download_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-hack-not-fake_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-bobux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/claim-roblox_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_off00003008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3008 22340 bytes
SHA-256: c4c3786753bf24b5b25ea18ab26b0cdce56d678de2a4c5b6dd2ddf58c3a06e42
font_01_sfnt_off000061c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C7 19156 bytes
SHA-256: ed10b83d0053d578f345c74aa9c1b5cee9770efbf14d5afc479d67c95b33b218

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