Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7681ea5b9420a64…

MALICIOUS

PDF

45.8 KB Created: 2021-06-10 18:44:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0a48bd5f054f003af84815bc8ff8519d SHA-1: d8969b082640396340121e671c35fb15009abdcf SHA-256: e7681ea5b9420a6467d1089bfe615d7661d555607bc2b37e57e8d269c9af93ae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on a "free generator / game hack" which redirects to malicious infrastructure. The document body and embedded links suggest a scam related to in-game currency or cheats. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/how-to-get-2021-robux-on-roblox-for-free-2021-game-hack In PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/how-to-use-cheat-engine-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/roblox-marketplace-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/star-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/hacking-into-chuck-lloyd-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-rainbow-stuff-you-can-get-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/how-to-hack-admin-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/roblox-hack-downloads-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/use-cheat-engine-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/robine-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/roblox-cheats-of-xbox-one_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/roblox-lumber-tycoon-2-cheat-engine-download-2021_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ed4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ED4 28116 bytes
SHA-256: f66ccc3b6690e9e0634dd4400a5abde2997f0a0cf5e5b5a2a1e183c963499811
font_01_sfnt_off00008ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECB 18756 bytes
SHA-256: 02660ee52aff60869d9f606c271e25e299b067f73ef27d10c9643b5a4082e659

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