Malicious PDF — malware analysis report

Static analysis result for SHA-256 33eeacbace653c12…

MALICIOUS

PDF

46.5 KB Created: 2021-06-08 21:50:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8e1bfbe1f432a3dd570619047c4a69f7 SHA-1: 18871e2d8d875397f9ca0b70b298b054de691915 SHA-256: 33eeacbace653c12a758f4a33a642c8c22451f9b2155949a215b1e6669e1e30b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and websites promising free game currency or hacks, such as 'how-do-you-hack-an-account-on-roblox-game-hack'. The document body and embedded URLs strongly suggest a social engineering lure to drive users to potentially malicious content. No scripts were extracted, but the presence of malicious links and the lure indicate a high likelihood of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/how-do-you-hack-an-account-on-roblox-game-hack In PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/mega-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/free-coin_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/flame-gg-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
font_00_sfnt_off0000564f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x564F 25680 bytes
SHA-256: a2f1f11f346e04dd406b1e43e30e948daca53cf940b42e7b2d09510eb484e45b
font_01_sfnt_off0000915b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x915B 18920 bytes
SHA-256: 59bd4cba8cbf75758a52c2a4e42e1ddf5192c5b1269d805a8e05abcca44db411

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