Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2c40a004e62564…

MALICIOUS

PDF

34.4 KB Created: 2021-07-02 06:46:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 08859083a4c1d63895ed22d73d344aa6 SHA-1: 0981b8176e7a4427e5f249bec06fb63942144e21 SHA-256: cb2c40a004e62564de90521c0866d705b3f61039a82c362472e57dd74018925a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and free in-game currency to trick users into clicking malicious links. The primary link, http://netcdn.co/app/431946152/roblox-free-items-script-pastebin-game-hack, is identified as a known malicious redirector. The document's structure and embedded links suggest an attempt to exploit user interest in obtaining free items for games like Roblox, leading them to potentially malicious download sites or further phishing attempts. No scripts were extracted, but the PDF's nature and the identified malicious URL strongly indicate a phishing or malware distribution vector.

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/roblox-free-items-script-pastebin-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-make-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/pastebin-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/crate-clicker-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-1b-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-promo-codes-2021-july_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/get-free-robux-by-doing-surveys_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-robux-for-free-no-scam_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/microsoft-bing-free-robux_GM431946152.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_off00002e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E4B 22452 bytes
SHA-256: 243b79c64b7da2a42eeb406a25b905f128620cca7cacadb5ab0410b45a71eeb5
font_01_sfnt_off0000607f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607F 19464 bytes
SHA-256: 6e7fa50e4c539b7dd21c1f07ab4196afd2b4c3e0fb101c6e3bf07333ac1b2ac2

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