Malicious PDF — malware analysis report

Static analysis result for SHA-256 844527db51f90816…

MALICIOUS

PDF

47.8 KB Created: 2021-06-08 17:08:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: db43990923dab9345f7bdfe81614a866 SHA-1: 09943e851d91086c4b71695a0c084d628574df77 SHA-256: 844527db51f9081669ce4c7d4488c7838c7bd5720270f5722591793d30c3e59c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically advertising 'game hacks' and 'free skins' for popular games, which is a common lure for malicious downloads. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of known malicious infrastructure. While no scripts were explicitly extracted, the document body and embedded URLs suggest a phishing or social engineering attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/roblox-how-to-get-free-skins-game-hack In PDF document text
    • http://digilib.unla.ac.id/repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-hack-on-roblox-little-angels-daycare-v10_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-legendary-swords-rpg-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-roblox-from-chaos_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/blox-fish-free-robux_GM431946152.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_off000052af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AF 25776 bytes
SHA-256: 74037795ff0282bd3595cb4481842f130bea79c8113fb27afab6218e17339182
font_01_sfnt_off00008dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD6 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9786 18504 bytes
SHA-256: 0b1238905e33140303ea3a14f6db916ace92381954aa324f40f57d53d9c5cf21

Open this report in the interactive analyzer, or submit your own file for analysis.