Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c57e0ca7ce67607…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 14:51:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 52233714f65af85c6499ad1d6d1caf5f SHA-1: ac3fb92a5b4c516552951d883f744d9f937c065d SHA-256: 1c57e0ca7ce67607f0b443cc0788bbe4f7581611a1874effdcc60a87f3301c84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, to lure users into clicking on content related to free game hacks and generators. The presence of a call-to-action button and the ML classifier's high confidence score further support its malicious nature. The document's primary function appears to be directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/free-minecraft-shaders-game-hack In PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-prison-life-free-kill_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/is-roblox-free-on-ps3_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-free-catalog-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/hack-para-volar-en-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-blood-moon-tycoon-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-one-piece-millenium-hack-devil-fruit-esp_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/pubg-uc-uk_GM1330123889.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/hack-of-2021-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-theme-park-tycoon-2-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/guuiddinfo-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-sans-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-do-you-get-robux-for-free-on-phone_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/mod-menu-in-roblox-hack_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
font_00_sfnt_off000031fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31FE 22016 bytes
SHA-256: 710711c918543e139c229d6546f2355018fca0a501f60f02485eaeeb2d3e0433
font_01_sfnt_off000062a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A1 18196 bytes
SHA-256: 772c6e2484254b38356c2a5cba65d97f7b15622d6ad87cf60449c5024fb57b41

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