Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c76cf18884259d4…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 23:38:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a58614190f2364112f322d031d3eafdc SHA-1: 3567fa957c2c5e8719dd9a29d7505188dfc31f0a SHA-256: 2c76cf18884259d42aca8ce156632baaa05f1f90d8d122977b1caffac12b17b4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency. The document body and heuristics indicate a lure for users to click these links, likely leading to further malware downloads or phishing attempts. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-unlimited-spin-hack-game-hack In PDF document text
    • https://htdvn.com/public/upload/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/minecraft-free-education_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/robux-page_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-free-spin-link-today-2021_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_off00004afc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AFC 25164 bytes
SHA-256: e0802b1d445a87fdeaf199f226e2417f3fe088949e44203065320d8e9067f60e
font_01_sfnt_off000083f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F9 18584 bytes
SHA-256: bff27dcdedd5af8a0d687a24d9b2ce7acea36a5c8901c6afee4cb29d8b6ebd85

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