Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca39f0035309ad33…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 22:20:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2f8e6a1abade4ce14b7e4fb1c42425be SHA-1: 346b3e13c1b1c554858ef6fd864d97d4da6261cd SHA-256: ca39f0035309ad33c299e59297caac643b9b4c4561121a78666d18e304a85cbb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as "free generators" or "game hacks" to entice users. The primary redirector URL is http://netcdn.tw/app/835599320/tiktok-free-folowers-twitter-game-hack. This lure is a common tactic for phishing or malware distribution. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/835599320/tiktok-free-folowers-twitter-game-hack In PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-fly-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-free-robux-cheat-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-beyond-hack-script_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/madcity-roblox-cheat-5m_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/tiktok-free-jazz_GM835599320.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/hack-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/roblox-powering-imagination-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/get-free-robux-here_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/free-robux-pagina-oficial_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/exploits-roblox-topkek-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana/repository/how-to-get-dominus-messor-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmmbk.com/cendana//repository/coin-master-hack-tool-ios_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
font_00_sfnt_off00002fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA7 22852 bytes
SHA-256: 9a54c2a96b10505d99feacaa9aefe9d46e7c046ec6db5b84990cb3276aeb7aee
font_01_sfnt_off000062e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E9 18208 bytes
SHA-256: b0ad5a67804b75ad4674757351c6e4a4f003ed62013791d0f6c63583923ea816

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