Malicious PDF — malware analysis report

Static analysis result for SHA-256 5adbba43f2428b06…

MALICIOUS

PDF

48.1 KB Created: 2021-05-17 05:27:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: be140202081dbc421dc13edb07b261aa SHA-1: ded67dc2ee25691a43fa96accc57ee41248f90cf SHA-256: 5adbba43f2428b06c83d51d79178c2f18a75b3ae4875921503a3b0001f5f2929
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering 'free generators' or 'game hacks', which is a common lure for phishing or malware distribution. The heuristic firings confirm the presence of malicious redirector links and a general ML classification of maliciousness. Although no scripts were extracted, the document body and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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 https://netcdn.xyz/app/406889139/how-to-get-free-cards-on-coin-master-game-hack In PDF document text
    • http://serviio.org/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://serviio.org/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://serviio.org/images/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://serviio.org/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/robux-gratis_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://serviio.org/images/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://serviio.org/images/coin-master-free-spins-and-coins-for-iphone_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B68 31140 bytes
SHA-256: 59a5a201d1690165257b5baa97aef10e131ea44cdc392b6c968f5403da52131e
font_01_sfnt_off00008e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3B 3444 bytes
SHA-256: b39cca3287854a650f44743c4a702bdff7faa46b021a3baec5679f57940f1c1e
font_02_sfnt_off00009a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5F 18048 bytes
SHA-256: bfb64ce9e7d02389d71d7e4e9bdd975b312ee1bb88589b15dc2c17ff59354668

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