Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6f057e3f682a1d…

MALICIOUS

PDF

33.1 KB Created: 2021-07-04 01:27:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 595e4fa8e26a0005860d39217bc90a8c SHA-1: 85c50849872edfa9084d3d265abbec1748278136 SHA-256: fd6f057e3f682a1dde8c137f9326ed8c4584575ab3b12e3c2b3b8608f89930dc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to a redirector hosted on 'netcdn.tw', which is flagged as malicious infrastructure. The document body and heuristics indicate a lure for 'free generators' or 'game hacks', specifically mentioning Minecraft and Roblox. This suggests a phishing or scam attempt to redirect users to potentially malicious sites for further exploitation or credential harvesting.

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.tw/app/479516143/minecraft-hacks-game-hack In PDF document text
    • https://www.tena-g.hr/files/roblox-hack-29-05-17_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-get-free-unlimited-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/using-cheat-engine-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/play-paid-games-free-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-add-a-second-floor-in-roblox-bloxburg-free_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/are-there-fe-free-games-roblox_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/krnl-download_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/obby-gives-you-free-robux-no-password-required-2021_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/microsoft-free-robux_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_off00002dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD5 22444 bytes
SHA-256: 3b8c41db97673e7e935f0dd27f60ecc6609c7a1c31903cada7b5fb63fe633da4
font_01_sfnt_off00005fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA7 18024 bytes
SHA-256: 1c9d96dc2872e32a417b1efa44fe2d308041ce7ded0f789352e35eeb38f40ed7