Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb436261e89a057…

MALICIOUS

PDF

33.6 KB Created: 2021-06-20 07:55:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 111e0075b72f0a303938b7de3e77f828 SHA-1: cc3ca4b0016579b2d2cad6998220e708de0628f1 SHA-256: acb436261e89a0571cb991fe5d074c9065be5dc81618751f2fa0098501bd9d7f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/free-egg-roblox-eggcellent-game-hack. This redirector is likely used to deliver a second-stage payload or phish for credentials. The document body and embedded URLs suggest a lure related to game hacks and free in-game currency, a common social engineering tactic.

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-egg-roblox-eggcellent-game-hack In PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/tiktok-accounts-for-free_GM835599320.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/bleu-roblox-hack-key_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/roblox-teleport-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/tuto-comment-hack-jailbreak-roblox-sur-pc_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://www.ktcart.co.in/uploaded_files/userfiles/files/coin-master-free-coins-cheat_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_off00002e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0E 22136 bytes
SHA-256: 239ef586acd3bef7edd03e6660403dedf43f89e1b547aed6e4c3ee9d1616e681
font_01_sfnt_off00005f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F10 18752 bytes
SHA-256: 3dad19a3c31ba074725661c82300bc4b3176c6647e489aeeea0fcc616185a8c0

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