Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bdd478b8ff6d876…

MALICIOUS

PDF

34.7 KB Created: 2021-06-30 08:09:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9ff25478ae9eb23da45a49d0b2369dcb SHA-1: 6ac325f8ffe6e4bd8a1e6421862a1587569c15a2 SHA-256: 1bdd478b8ff6d87639af3609c343be1758e52c7d6a12599d954b9e4443b947c5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a known malicious domain, masquerading as a 'free generator / game hack' for popular games. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting the malicious site. The ML classifier also strongly indicated maliciousness.

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/free-robux-roblox-promo-codes-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/cheat-codes-for-roblox-mad-city_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-and-tix-generator-no-survey-no-download_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/all-free-stuff-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/sinkable-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/citixen-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/robux-match_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC9 22324 bytes
SHA-256: 1119881099f20a9b9a73bd4b50c8b813f73f7eeed5180f47c3008463a8480bf5
font_01_sfnt_off000061a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A9 19380 bytes
SHA-256: a452d0c191873ed4d1cd88fa82656ca938fba3e74f496bef56901f9d10460b65

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