Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e916a3b931c641…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 08:57:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e66e00153dd27ac0a14bcd1b89fba65b SHA-1: 499724a1165d287e302e9d1a7084d832e965cf8c SHA-256: 52e916a3b931c64131690dcf9d55fb9581bc35abe9325e5877d58ec44b43261b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and free generators. The primary lure URL is http://netcdn.tw/app/479516143/how-to-minecraft-for-free-game-hack, which is flagged as a malicious redirector. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for further malware delivery 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/479516143/how-to-minecraft-for-free-game-hack In PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/best-hacking-software-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-someone-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/assassin-roblox-hack-on-the-sky_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hack-any-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/pokemon-go-free-coins-2021_GM1094591345.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-roblox-clothes-wiki_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-cheat-cra-crusher_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-be-admin-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-roblox-aimbot_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-minecraft-skins-ps4_GM479516143.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_off0000340c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x340C 23092 bytes
SHA-256: cf3851b18274546edf1b6eab901467c77db708e7bdbfb115b71e4989b555ca30
font_01_sfnt_off000066b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B0 18164 bytes
SHA-256: eddd1dc5401f40241efd4fd789013b00c25f98bc17cd10cad51fad4604a0868d

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