Malicious PDF — malware analysis report

Static analysis result for SHA-256 a17fe9e4d3f49cc0…

MALICIOUS

PDF

43.1 KB Created: 2021-05-12 16:53:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: de48f34d8a5565a74bb4a7d08a25d7c4 SHA-1: b15bf7f70c010e075888b61fb6dad49ce082f8e2 SHA-256: a17fe9e4d3f49cc0f78773e12e8ab2a6083ee1a4829b07157975644cd04b34e6
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors and impersonates Facebook to lure users into clicking on a 'game hack' or 'free spins' offer. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/legitimate-coin-master-free-spins-apk-game-hack.
  • 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/legitimate-coin-master-free-spins-apk-game-hack In PDF document text
    • http://technologicalsc.com/images/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/give-free-robux_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://technologicalsc.com/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://technologicalsc.com/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://technologicalsc.com/images/free-robux-instantly_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
stream_003_off00004a45.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A45 25540 bytes
SHA-256: 285ac71fd01c7943a561ab948dc35c26a47ed0dfd7763be740d8eb9d159031f5
font_01_sfnt_off00008556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8556 18604 bytes
SHA-256: 744d2d183457972f47b0db91107cea2f4bf33f1c8b8b46bcb558057de1b31a04

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