Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d5c002867aff7e…

MALICIOUS

PDF

44.3 KB Created: 2021-06-08 18:32:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 68c0668710c92531cc6ff5c0494b787e SHA-1: 4863890690f522c817df5ee1f27de67ca8dd1030 SHA-256: f2d5c002867aff7e0c358fa570be37566efa7801d496e88483557fc26cf821fc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The primary lure URL is https://netcdn.tw/app/431946152/this-app-gives-you-free-robux-game-hack, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attempt to lead the user to a potentially harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/this-app-gives-you-free-robux-game-hack In PDF document text
    • http://digilib.unla.ac.id/repository/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/tiktok-free-followers-hack_GM835599320.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-hack-vampire-hunters-2-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-generator-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/bloxpage-free-robux_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_off00005153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5153 24664 bytes
SHA-256: b4fa7e7f5a744808b7063341d52785249ec0474c31fe0a4e175a096f9ac9158b
font_01_sfnt_off00008944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8944 18752 bytes
SHA-256: 8f666a863b8060ad5652a74b3036e135874bdff2eadd4749bf08548c0aa24285

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