Malicious PDF — malware analysis report

Static analysis result for SHA-256 42fe29e6b1130a61…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 18:04:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d5aa865568114d5d0d4a14a59f27e1cc SHA-1: f5a7bac174d8fed56fe459ee66e2ca081c8f7cf3 SHA-256: 42fe29e6b1130a61b9fc2f3ab6d111ea6bf658810ef5be30912405367dc9f383
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to 'netcdn.tw' which is flagged as a game hack redirector. The document body and heuristics indicate a lure for free game items, a common tactic for phishing or malware distribution. No scripts were extracted, but the presence of external links suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/coin-master-unlimited-free-spins-game-hack PDF link annotation
    • http://www.wholesomeliving.in/uploaded_files/userfiles/files/minecraft-survival-free_GM479516143.pdfIn PDF document text
    • http://www.wholesomeliving.in/uploaded_files/userfiles/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wholesomeliving.in/uploaded_files/userfiles/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.wholesomeliving.in/uploaded_files/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.wholesomeliving.in/uploaded_files/userfiles/files/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.wholesomeliving.in/uploaded_files/userfiles/files/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • https://www.wholesomeliving.in/uploaded_files/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.wholesomeliving.in/uploaded_files/userfiles/files/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://www.wholesomeliving.in/uploaded_files/userfiles/files/roblox-its-free-advert_GM431946152.pdfIn PDF document text
    • http://www.wholesomeliving.in/uploaded_files/userfiles/files/roblox-rules_GM431946152.pdfIn PDF document text
    • http://www.wholesomeliving.in/uploaded_files/userfiles/files/how-to-get-free-robux-codes-that-work_GM431946152.pdfIn PDF document text
    • https://www.wholesomeliving.in/uploaded_files/userfiles/files/300-roblox-accounts-free-v34m_GM431946152.pdfIn PDF document text
    • https://www.wholesomeliving.in/uploaded_files/userfiles/files/roblox-hack-money-apk_GM431946152.pdfIn PDF document text
    • https://www.wholesomeliving.in/uploaded_files/userfiles/files/coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.wholesomeliving.in/uploaded_files/userfiles/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://www.wholesomeliving.in/uploaded_files/userfiles/files/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://www.wholesomeliving.in/uploaded_files/userfiles/files/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://www.wholesomeliving.in/uploaded_files/userfiles/files/free-outfits-roblox-names_GM431946152.pdfIn PDF document text
    • http://www.wholesomeliving.in/uploaded_files/userfiles/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://www.wholesomeliving.in/uploaded_files/userfiles/files/hack-coin-master-no-verification_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_002_off00003143.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3143 22788 bytes
SHA-256: c61d32239ef8235f9289c01ef9ed5e9007f54faa8312a66d1d41c90cd61c3442
font_01_sfnt_off00006449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6449 18868 bytes
SHA-256: 2f9cd22228cedeba36a8977c1f12fab16e0ead4a7882c056539973ab18e06058

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