Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a3435111bc0a93…

MALICIOUS

PDF

35.6 KB Created: 2021-07-07 06:07:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1a41bfd83f2c5b9919b19497419be482 SHA-1: 9b65b91854b4d33629c8b173ae854d41fa5b0a8a SHA-256: 93a3435111bc0a9380a8a3f803b29e4b94426b677bc5b4b5602c4aea9568bfc4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to 'netcdn.tw', which is flagged as a malicious redirector. The document body and heuristics indicate a lure for game hacks, likely intended to lead users to malicious websites or download further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in free game resources to redirect them to malicious infrastructure.

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.tw/app/406889139/coin-master-hacksco-game-hack In PDF document text
    • http://www.travelone.ae/userfiles/files/fps-hacks-roblox-aimbot-how-to-activate-aimbot_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-get-free-robux-without-builders-club-2021_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-roblox-hacks-pasldfopasfksofmnj_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-hack-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/https-mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-groupe_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/comment-avoir-de-largent-hack-sur-roblox_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-block-someone-on-coin-master_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
stream_002_off000034d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34D0 23344 bytes
SHA-256: d65fdbb20b797f555e685a27a640e723b6a9ea07ca5f7b3123f38d2e1879e0cf
font_01_sfnt_off0000697d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697D 18004 bytes
SHA-256: 2f3a5855c5bac228d8d27cc7f61b57eebad79d58a924e470a0477843dff273c7

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