Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa51989a85a9be2e…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 04:30:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 933644c548246979e8419889c34364a0 SHA-1: 056e33f557f7b5a8570cbfa9e2fa3db9754e8620 SHA-256: aa51989a85a9be2ed1016fab9fd22f1e997a8f16b02892ca0e0488576e4ae3aa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of game hacks and free currency. The primary malicious link is http://netcdn.co/app/431946152/free-robux-on-ipad-easy-game-hack, which is designed to lead users to potentially harmful content. The document's structure and embedded URLs strongly suggest a phishing or scam attempt aimed at tricking users into visiting malicious sites.

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/free-robux-on-ipad-easy-game-hack In PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/did-biggy-get-robux-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/noob-vs-pro-vs-hacker-vs-god-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hacks-for-games-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-jailbreak-cheat-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-roblox-accounts-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/contact-roblox-about-being-hacked_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-tower-battles-hack-download_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/download-to-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-get-free-robux-without-doing-anything-2021_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_off00003010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3010 22364 bytes
SHA-256: 315915bec0ee1fe9d292a2fa70a0b94396c89122c72929f5f54c15eeb40ecdbd
font_01_sfnt_off000060e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E8 19244 bytes
SHA-256: 60076168b566e09609dd6d6a7abeeb458463483b4880609a66f570e35c9f115a

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