Malicious PDF — malware analysis report

Static analysis result for SHA-256 343a58439ce993e5…

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 05:00:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e75b0edc5378e80c31c46b16cf7151b1 SHA-1: 6d0d0dab91efa983a43e02f1d39ba4f94c5ce812 SHA-256: 343a58439ce993e597ac3227c744f145cb148c5522d904855b264cf96f6e6b53
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to malicious domains, masquerading as game hacks and generators. The document body and heuristics indicate a lure for free game items, likely leading to a phishing or malware download site. No scripts were extracted, but the presence of numerous malicious redirector links and the ML classifier's high confidence score strongly suggest a malicious intent.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/479516143/toolbox-for-mcpe-game-hack In PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/static-moonactive_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/master-coins-free_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/hack-avatar_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-to-hack-and-get-free-robux_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_003_off00004de7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DE7 24852 bytes
SHA-256: 76fa948d88a46c21f7fc830e4bc084709d3a3fc06d1acd1af23663b10b0e0bf7
font_01_sfnt_off00008608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8608 17876 bytes
SHA-256: eda4d52e79abf7a1b879143452569305f904f3468e032f0c3d3d7cbd308c3d80

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