Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccd8e88a7d849b9…

MALICIOUS

PDF

51.0 KB Created: 2021-05-12 01:00:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: da8d9ccf39fa93d242178954d8394cf2 SHA-1: 3adb8dd0852503ca521cad65136dc614a2e676c5 SHA-256: fccd8e88a7d849b9431bf7a865e5b7cd51f2577898a0417d908eab3de2638cd3
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 'game hacks' and 'generators'. The presence of these links, coupled with a machine learning classifier's high confidence in maliciousness, indicates a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded URLs suggest it is designed to trick users into visiting a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8594

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.xyz/app/431946152/roblox-hacks-for-mac-game-hack In PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000493b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x493B 30156 bytes
SHA-256: a41ae863b0d450334ea12b916698393d72dd4a5989a4f812e2008bc797338844
font_01_sfnt_off00008d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5E 2824 bytes
SHA-256: 45bf821f81e84f4aa8d8374f492b182b36404f38b462c7dc471deaad6ab5c104
font_02_sfnt_off00009706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9706 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA418 18544 bytes
SHA-256: b54d427420c2b6acb67d73efd488d39bfb4939947f3518d8bf7854551a24b695

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