Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5053b28599c22c7…

MALICIOUS

PDF

37.5 KB Created: 2021-06-29 20:29:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 769d37befb69893a11aad957e31e3031 SHA-1: 66e87da1aba792b6a0c1dbedb8356ded4b49278a SHA-256: c5053b28599c22c7b8782463f3efd9d03be9544aa7d66e686109b6d018c6584a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The document body and heuristics indicate a lure related to game hacks and generators, aiming to entice users to click the malicious URL. This likely serves as a first stage to download additional malicious content or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.co/app/431946152/bad-words-on-roblox-hacks-game-hack In PDF document text
    • https://library.institutpendidikan.ac.id/repository/mapa-de-free-fire-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-elemental-battlegrounds-element-hack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-claim-generators_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-shirt-free-copy_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-do-people-hack-roblox-accountsx_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-do-i-get-free-robux-and-tix-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-codes-november-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/robux-online-hack-ml_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-teeth-in-sharkbite-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-spin-hack_GM406889139.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_off00003c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C1B 22364 bytes
SHA-256: cf0c35030a2a8bcd01c8aee8d3a4bdd5abf7dc14707d458c4bb16f532fec8787
font_01_sfnt_off00006dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD9 19028 bytes
SHA-256: 42cc3d996a1ce0c0a4f04fa9b51849462fbc1d41cddcf398c4817fe1dc4e709a

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