Malicious PDF — malware analysis report

Static analysis result for SHA-256 0339f33a6fd5838a…

MALICIOUS

PDF

46.1 KB Created: 2021-05-10 23:15:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f7e0204038da2ac4631d503561f892f0 SHA-1: 74dc9486e9a53527f334396bd3b100ccc3650e12 SHA-256: 0339f33a6fd5838a8d6e997517718bdb9f4d04e5842d7861ea431d0c1f00ea23
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a lure for free game currency or hacks. The document body and heuristics indicate a clear intent to trick the user into visiting these malicious URLs, likely leading to further malware downloads or phishing attempts. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/earn-free-spins-for-coin-master-game-hack In PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://e-learning-mis-alkarimiyah-keblama.com/__statics/gudangsoal/files/free-rare-cards-for-coin-master-christmas_GM406889139.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_off00004ba8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA8 26876 bytes
SHA-256: 312e6713d2c6ee0f56a320a862d98980bb08bcdb833d55d58755661bb96d35bc
font_01_sfnt_off000088fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88FC 2944 bytes
SHA-256: e8dca988325d5b5adea380508eed68725fcb814536e93cd420f224b7166adc23
font_02_sfnt_off00009327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9327 17884 bytes
SHA-256: 5bc2196f595048cd80966dd69d9ac8940a13da3f79f6604a1c949c9b3772e03c