Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40090ac088108a0…

MALICIOUS

PDF

36.1 KB Created: 2021-06-30 04:32:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0e7fc8d350ee4b050d8d7965bec504dd SHA-1: 2ce9fbc8cd46b9b2aeba229981ed824ab407eb64 SHA-256: b40090ac088108a0b2393de4a7a99d2edd2f0abeda6e9d4dfed5765ed8b15403
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes game hacks and free in-game currency, suggesting a phishing or malware distribution lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of external URIs and the document's theme indicate an attempt to trick users into downloading further malicious content.

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.co/app/431946152/how-to-make-a-badge-for-free-on-roblox-game-hack In PDF document text
    • http://digilib.unbari.ac.id/repository/download-roblox-free-on-the-apple-store_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-apocalypse-rising-hack-december-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-printables-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_002_off000033b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B8 23016 bytes
SHA-256: 0887ed74eb2c4e3b9c7fb5a0ef1c3a313a07a78c75b92e92764026c0860336da
font_01_sfnt_off0000677c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677C 19356 bytes
SHA-256: d660975420a40a089473f2392aeb26dfe216a35ad34c8c075f7e7a3b48c2fba8

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