Malicious PDF — malware analysis report

Static analysis result for SHA-256 3adb7e80cedce3fc…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 10:44:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 73f48fd0282fd547003e5bd356b309e6 SHA-1: 72b63c3311761bdb89c5063e0489fb26ab64d4f7 SHA-256: 3adb7e80cedce3fc3bfa270e0933a1f2f3b39a91101f22823ef2b270a75c0a10
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains multiple links to malicious redirectors, disguised as 'free generator' or 'game hack' lures, which are consistent with credential phishing or malware distribution. The presence of an MFA lure heuristic further suggests an attempt to harvest session tokens or abuse multi-factor authentication. No scripts were extracted, but the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.online/app/431946152/free-robux-for-kids-no-verification-game-hack In PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-hack-codes_GM431946152.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
stream_004_off00005637.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5637 26380 bytes
SHA-256: bd8620011f5f7c992647eae06e16e5cd6d5be8936ec7672b92168bd3f47435c7
font_01_sfnt_off00009258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9258 18776 bytes
SHA-256: abcd165e4b695e85902e5e0162dd8c883b494cae8faf27dbfb1f0dc34095f980

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