Malicious PDF — malware analysis report

Static analysis result for SHA-256 7adbbafb88048bd9…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 17:17:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7fc3d5e669c957fe5dba7c615349d7d7 SHA-1: 0ff743ac8216f86a44865a4fee2efe94524ef2c7 SHA-256: 7adbbafb88048bd9d2a2ff7ba882ddb1f94874ed69cfc9dfa6fdae00eb96ffa2
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links designed to lure users into clicking on them by promising free game currency or hacks. The primary link, http://netcdn.tw/app/835599320/free-followers-for-tiktok-game-hack, is identified as a malicious redirector. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious sites that may host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/835599320/free-followers-for-tiktok-game-hack In PDF document text
    • https://www.tdbaska.hr/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/roblox-jailbreak-glitch-through-walls-hack_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/descargar-roblox-hackeado-para-pc-2021_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/roblox-hack-no-human-verification-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/lumber-tycoon-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/code-to-access-a-game-that-gives-90m-robux-free_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/how-to-hack-a-draw-it-server-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://www.tdbaska.hr/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-obc-accounts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/hack-tool-robux_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tdbaska.hr/files/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • https://www.tdbaska.hr/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.tdbaska.hr/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.tdbaska.hr/files/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://www.tdbaska.hr/files/coin-master-hack-without-verification-2021_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_off000033b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B9 22612 bytes
SHA-256: 2c6eca708cc76ca0232ca3afff5071b6973602a68284bf73bbec055fa64484a3
font_01_sfnt_off00006610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6610 18208 bytes
SHA-256: c18dc138d3fa9ce835d1b8f2974e0da5a27744aad7601cad562b97896f2945be

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