Malicious PDF — malware analysis report

Static analysis result for SHA-256 03dec6b4865b41ab…

MALICIOUS

PDF

35.8 KB Created: 2021-07-06 07:30:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 705347066279cdf8b69de020afebaeb4 SHA-1: 00fb315ddf13fac5589e8248a5ed1181be6ef679 SHA-256: 03dec6b4865b41ab1a15b4503f16a3318facbb59183f001dfecd6ad015b640af
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure appears to be related to Roblox, with the main redirector URL being http://netcdn.tw/app/431946152/roblox-apk-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for malware distribution or credential harvesting.

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/431946152/roblox-apk-hack-game-hack In PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/getbucks-freecom-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-how-to-get-free-robux-in-pc_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/www-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/counter-blox-roblox-offensive-hacks_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/hacks-for-royal-high-roblox-2021_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-anime-fighting-simulator-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/hack-configuration-roblox-robuxian_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-fly-hack-mobile_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-bc-on-roblox-2021-no-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/i-was-hacked-in-roblox_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_off0000354f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x354F 22772 bytes
SHA-256: 1b15723e0da6f0565d493f49a933dd2a168271deaeb1844acb792abf22ab4f36
font_01_sfnt_off000067a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A0 18832 bytes
SHA-256: 4a54e3c0999d22341ed87b7a4ab614cdfd6f3715e6a9eb51b324e9e7408846b1

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