Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f528bb3700e9e0c…

MALICIOUS

PDF

35.4 KB Created: 2021-06-19 05:17:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fddcc1833c0312c1bb085181851cbf02 SHA-1: 08ec44c9a14e1f348582c030ce1357ad383f0bdd SHA-256: 6f528bb3700e9e0c0fdb0cfa006bc5a0ab7fd39bab1ea1962e84e260f96f7873
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and extracted URLs strongly suggest a phishing or scam attempt, likely to trick users into downloading malware or visiting further malicious sites. No scripts were extracted, but the PDF's structure and embedded URLs are sufficient to infer a malicious intent.

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.co/app/431946152/free-roblox-games-without-password-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-rebirth-roblox-blob-simulator_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-tix-and-robux-hack-no-download_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-2021-code_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/pokemon-go-free-3-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-link-2021_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
font_00_sfnt_off00003178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3178 22004 bytes
SHA-256: ed7d3cd1643596f345433f7dfdc51b20a7a0879ab687265274d0506f680bc482
font_01_sfnt_off00006247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6247 20128 bytes
SHA-256: e52ac6ab3ff65efb44ce3a031ddf4c7ffaf205c0a77b235c19c64cb961b14d95

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