Malicious PDF — malware analysis report

Static analysis result for SHA-256 93007f521fcbcf2a…

MALICIOUS

PDF

35.4 KB Created: 2021-07-01 08:05:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0312fdea826ef41a4d2d6c5d497fb6ad SHA-1: bd8f4c6fdb7567049e5f30827b1541b8693edf27 SHA-256: 93007f521fcbcf2af1e940a27e8c72fddbcb734d6cb19db1c6f9fc46e1008e91
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, employing 'game hack' and 'free Robux' themes to entice users. It contains multiple links to redirectors and other malicious PDFs hosted on suspicious domains, indicating a chain of malicious content delivery. The primary malicious URL identified is http://netcdn.co/app/431946152/free-roblox-accounts-2021-with-robux-game-hack, which is flagged as a known malicious redirector.

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-roblox-accounts-2021-with-robux-game-hack In PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/how-to-download-roblox-hack-v65_GM431946152.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/how-to-hack-roblox-no-downloads-2021_GM431946152.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/free-running-gamepass-parkour-roblox_GM431946152.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/roblox-games-play-free-no-download_GM431946152.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/coin-master-download_GM406889139.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/roblox-wifi-hack_GM431946152.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/how-to-be-a-hacker-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • https://rerempahanspa.com/ckfinder/userfiles/files/coin-master-free-account_GM406889139.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_off00003169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3169 22312 bytes
SHA-256: b6532cd16129629d86397c985621987390706bc51713979c1a68de8398ce8549
font_01_sfnt_off00006325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6325 19780 bytes
SHA-256: a55470c357d6117f87c66cfcc5dd60461d5ad292bd735cfee1ec5bb843310ba7

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