Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a173d10f1089687…

MALICIOUS

PDF

34.6 KB Created: 2021-07-01 05:58:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b95bbe40648dba0a535d7355be2b4461 SHA-1: c0b28ed11816aa6b67dd72089a6028f5f87292af SHA-256: 9a173d10f1089687c121af8a29121445f76a9e4a3356eb7388236e698e3a5ac3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains numerous URLs and text related to free in-game currency and hacks, strongly suggesting a phishing or scam lure. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of external URIs indicates an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

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-2021-robux-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/galaxy-beta-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-do-you-get-robux-5m-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-promo-codes-2021-october_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-dinosaur-world-progression-cheat_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-change-your-username-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-headphones-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/swagbucks-for-free-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-rewards_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-free-alt-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-today-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-much-pubg-uc-cost_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/cheat-roblox-bad-business_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/blox-world-free-robux_GM431946152.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_off0000302e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302E 22416 bytes
SHA-256: 2b79dbea874ff0dff6d280abbfce2fe7a24cf7323b9333693c3ab18ac406537e
font_01_sfnt_off0000620a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620A 19116 bytes
SHA-256: af14d1fa5b4f919e14fbfd2207fee29f86c7e1258ad11836ead4aea48baef512

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