Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1871382f9ce9757…

MALICIOUS

PDF

46.4 KB Created: 2021-06-08 16:58:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9ff92ed1173c1b4b17ed4effd16272b5 SHA-1: 6b17b46f4321b8c527f2a74dcb89b2281c9a702a SHA-256: d1871382f9ce97575cd35eedfefd58b3ed66bd722b7fa3e8fddf83a38128ff2c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to known malicious redirectors, disguised as game hack generators. The primary link directs users to a URL associated with free game hacks, likely a lure to download further malware or engage in phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-the-dump-work-at-a-pizza-place-money-hacks-game-hack In PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-characters-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn 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/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-protosmasher-whitelist-key-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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_off000054b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54B5 24812 bytes
SHA-256: bb81b651aeb05331cb3db54b5ca100c52856cb0659355747dc393fb47a67efe6
font_01_sfnt_off00008d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D95 20128 bytes
SHA-256: 55c41a45b1946c230b7017cff5ad5e691bd607c4917e7ccc3ebd282aa6aa4c51

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