Malicious PDF — malware analysis report

Static analysis result for SHA-256 35a0c7d55ea44209…

MALICIOUS

PDF

45.8 KB Created: 2021-05-17 08:39:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e63c689f9ac270973fd7efb6e90a3284 SHA-1: 69f3058de649405d8139e92ab839108d53926216 SHA-256: 35a0c7d55ea442096b4fcac0d57538f5cd142bbc532165a0ee3d86a88ec21b21
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free currency'. The heuristic firings indicate that these links are associated with known malicious redirectors and lure users with deceptive content. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious website, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/406889139/como-hackear-coin-master-2021-game-hack In PDF document text
    • https://www.vacationrentalsincroatia.com/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/free-robux-script_GM431946152.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/master-game_GM406889139.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.vacationrentalsincroatia.com/images/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BEF 25404 bytes
SHA-256: 76100eca1b762396658959c5351fb0042ad9faf46b1713a838561ef61af7c377
font_01_sfnt_off00008587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8587 18380 bytes
SHA-256: 7d079b1918a151c222a156c250c5aa0e1b0afb08b6f17fdb7ccf3df79397c72b
font_02_sfnt_off0000a7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D9 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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