Malicious PDF — malware analysis report

Static analysis result for SHA-256 95278a782fb018ad…

MALICIOUS

PDF

48.6 KB Created: 2021-06-11 06:22:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9c8a7abc229fbe2dfd238c3181b20660 SHA-1: 6b31d303a87ab630dd9f588652f5d58452860d00 SHA-256: 95278a782fb018ad504143704cd0ed4db7d58c0ac645d193642104bc4066a483
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF contains numerous links designed to lure users into clicking on potentially malicious content, such as game hacks and free currency generators. The primary link directs to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in online games to deliver a payload or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/shirt-template-roblox-download-free-game-hack In PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robux-hack-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-tix_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/can-you-earn-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-games-that-you-can-play_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/pubg-uc-free-generator_GM1330123889.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fcd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FCD 25676 bytes
SHA-256: 2894cacb5ac4040e8f33b25dce17a122ec82971acf177c7e28743d78a2c099e7
font_01_sfnt_off00008aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA8 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000097ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97BA 19508 bytes
SHA-256: 9c36c9ad054a2950dbe71ccb14dbc4f9785eeab11f3a6f4194f31ea244c22c25

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