Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab07c2ab644789d…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 21:22:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ae14279b436742bb18a2b6e70c718ec8 SHA-1: 5469a617fc1c62813096330808b6a03787a14bf1 SHA-256: 9ab07c2ab644789dcbed71c1f0ae76494b85313014ac789bc7ec38671e7b69ec
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including a critical redirector to 'netcdn.tw' disguised as a game hack generator. The document body and heuristics indicate a lure for game-related cheats, likely to deliver malware or phish for credentials. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest malicious intent, potentially involving JavaScript execution for further redirection or exploitation.

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/431946152/roblox-verification-game-hack In PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/how-to-make-a-free-group-on-roblox_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-rewards-roblox_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/roblox-exploit-for-free-download_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/websites-that-give-you-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/laxify-hack-roblox_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/red-boy-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/easy-hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://traveljogja.net/ckfinder/userfiles/files/robux-hack-on-android_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_off00002f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6A 22264 bytes
SHA-256: 22df4551291e405d28545fc5c67c1ed6878a14e4d5e540a70d93780193b6036c
font_01_sfnt_off000060e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E5 18844 bytes
SHA-256: 1d23844033c5d0e268a29dee9f1dec73eff41ea62acf0a3cefce86758608eb1a

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