Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4724424929ac749…

MALICIOUS

PDF

33.9 KB Created: 2021-06-27 19:52:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3c177697129b0c7904f4fdb2e9bb8773 SHA-1: 7729c079561a07d5b84c3e165c964a836826692a SHA-256: c4724424929ac749b1e1992b479a5425aa3877cd4652952987dba4fdbe2ccc82
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to malicious infrastructure. The document body also contains the same malicious URL, reinforcing the lure. The presence of a 'password-protected archive' heuristic suggests the user is expected to download an encrypted payload, which is a common tactic for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/free-roblox-autofram-game-hack In PDF document text
    • https://library.institutpendidikan.ac.id/repository/hacks-on-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-cheats-card-codes-showing_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/bullet-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-go-into-somenes-roblox-account-hack_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/looking-for-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hacks-para-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/adopt-me-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-prison-life-hacks-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF0 21872 bytes
SHA-256: ca668075db022294b77ac1916cd60b7b4bb81a8edc77c18b56d35f4334bc360a
font_01_sfnt_off00005f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F21 19152 bytes
SHA-256: 7453e0b0ca71f813c9474f78458d01e61da04faa3e77c18224715f0ec02aa662

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