Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c604ded73bb3f6c…

MALICIOUS

PDF

43.0 KB Created: 2021-05-10 20:30:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 697fbaabf09ff2d5b60863c2f78c405c SHA-1: 708b530c11f5fe7f180e160808122caedc4662c8 SHA-256: 2c604ded73bb3f6c4cd7d84ccd8b5904598a0e573a247b7a6552ecdbc2aee7f6
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The document body and heuristics indicate a social engineering tactic to trick users into clicking these links, which likely lead to further malicious content or malware. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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-free-spin-link-today-download-game-hack In PDF document text
    • https://reggieslockandkey.com/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/robux-website_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/block-best-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-coins-app_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_off00004964.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4964 25792 bytes
SHA-256: e32fd6e8198f6b6fe57241e5249a8d33fd632f4ad1b240236a5beb03d5df2c92
font_01_sfnt_off000083f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F1 18816 bytes
SHA-256: c5a160641c4edab75c60996e0f798f3e883f872898d31e041e46be69cf2ac151

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