Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0dc05389611672…

MALICIOUS

PDF

33.6 KB Created: 2021-06-27 22:20:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c056bdd9865fde49e887f4278c041b4a SHA-1: 481f8b164078ab4185366607237542cd929b9d27 SHA-256: 4c0dc0538961167260ba8e37f6cc87af934897098455de270235318d3d2c5883
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'game hacks' and 'free generators' for popular games. The primary lure, 'how-to-get-builders-club-for-free-on-roblox-2021-game-hack', points to the malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful 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/how-to-get-builders-club-for-free-on-roblox-2021-game-hack In PDF document text
    • https://razredna-nastava.net/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-followers-roblox-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/guuddinfo-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-animation-in-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-one-app-rewards_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-2021-cheats-flying_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-hack-site_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
font_00_sfnt_off00002e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E8D 20916 bytes
SHA-256: 3d5d5250be38e8107fc87aa07d597175d059726091662941d1b7da597eae5283
font_01_sfnt_off00005bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD0 19756 bytes
SHA-256: 8b08bdc7a0e8f7769f02fc6d7d5948f50e8046c5f0281726b5a283f72cbe179e

Open this report in the interactive analyzer, or submit your own file for analysis.