Malicious PDF — malware analysis report

Static analysis result for SHA-256 a323f04c12b3add9…

MALICIOUS

PDF

43.5 KB Created: 2021-05-20 02:20:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c42fd2a6a662384d7511ba3ddfeccbd5 SHA-1: 76af180b5e81d0662a54049c0cfab5bc9a5ddc7d SHA-256: a323f04c12b3add9e4760f72bcd2709ba0778d04c9b8637844f5e3dea1f3b3d2
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1553.005 Mark-of-the-Web Bypass

The PDF document contains multiple links designed to lure users into clicking on a malicious redirector disguised as a "Coin Master Hacks Free Spins" generator. This redirector impersonates Facebook and leads to a credential phishing page. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple malicious links indicates a high-confidence phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/coin-master-hacks-free-spins-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/coin-master-hacks-free-spins-game-hack In PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn8kuningan.sch.id/__statics/gudangsoal/files/cm-free-spin-link-today_GM406889139.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_off00005037.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5037 24860 bytes
SHA-256: eef19e81221b2c59789c56f5b47d2646ae06680d6f89499242de7ca754f124f3
font_01_sfnt_off00008870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8870 18056 bytes
SHA-256: 12d79a7ddbb75c7a0854102822057d5441bee2ca4a20c79f8211a3d0b9a1f375

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