Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a73ea71f0bdb82…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 09:39:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f42ab2003bc26e86c1b40426382ad454 SHA-1: ca86368ccfcfce49439e827234c5f93a34ee8d89 SHA-256: 86a73ea71f0bdb82d030b968dd07481d618cbb31f6ee232b673358000adf853f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free spins. The primary link directs to a site associated with malicious activity, suggesting the document is designed to trick users into downloading or visiting further compromised resources. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-free-spins-1-coin-master-game-hack In PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-pe_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/pokemon-go-free-trainer-codes_GM1094591345.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/pokemon-go-free-lucky-egg_GM1094591345.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/freecoins_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-hack-2021_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_004_off0000511a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x511A 24936 bytes
SHA-256: 8165d81b3786f7843d88a014268ca7fd9273e09a5843dc0e1c521a1fda14c1ac
font_01_sfnt_off0000887a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x887A 17992 bytes
SHA-256: 6d8d99a319dc3508354c514a9dfb36b9314a67d789b860417dc5e127b03e5453

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