Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc467cba25842c80…

MALICIOUS

PDF

34.9 KB Created: 2021-06-26 20:42:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d564d3f87e620ae243160c5f87ce4589 SHA-1: 9934663f1425914988029cfb8cf79e37222d4fff SHA-256: cc467cba25842c80d94ce82df02b84653d9060f1624e08ab8c1b43eb3ee68e04
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free in-game currency or items. The primary link, http://netcdn.co/app/431946152/free-robux-2021-legit-feb-unpatched-instantly-no-wiat-game-hack, is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirector chain designed to deliver a payload or phish for credentials.

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.co/app/431946152/free-robux-2021-legit-feb-unpatched-instantly-no-wiat-game-hack In PDF document text
    • http://tasleemdubai.com/userfiles/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/robux-no-survey_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/pubg-uc-avatar_GM1330123889.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/easy-way-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/admin-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/get-free-robux-without-doing-anything_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_off00002db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB2 22360 bytes
SHA-256: 93b2ebca496146dcb8e97f833ee6db5bb0571132cd485916d370e7524c8c0e1c
font_01_sfnt_off00005f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F88 20308 bytes
SHA-256: c84623288127676822cc887cc807a5beec665c1f2ad7ef2c7d8ce820312e8161

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