Malicious PDF — malware analysis report

Static analysis result for SHA-256 f018dc7aae285153…

MALICIOUS

PDF

34.3 KB Created: 2021-06-19 16:58:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 304631db44b7eb09189d778019e3bc7c SHA-1: 368ec2fd9fd0d6ad1e60ef8ec7b4fc5f20767dc0 SHA-256: f018dc7aae285153faad2a31b15a63f89d8e24856ce0811fcda8c7643505309d
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs social engineering tactics, specifically a 'ClickFix' lure, to trick users into executing commands. The document body and heuristics indicate it directs users to copy and paste commands into a terminal, likely to download and execute a second-stage payload from the embedded URL. The primary URL, http://netcdn.co/app/431946152/how-to-recover-roblox-account-that-was-hacked-game-hack, is associated with malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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-recover-roblox-account-that-was-hacked-game-hack In PDF document text
    • http://schrichte.de/images/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/free-roblox-injecter-v3rmillipn_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/roblox-money-hack-amd-city_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://schrichte.de/images/best-free-roblox-injectors_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/copy-and-paste-to-terminal-robux-hack_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/how-to-get-god-mode-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/roblox-cheat-engine-tutorials_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://schrichte.de/images/roblox-fly-hack_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_off00002f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F39 21640 bytes
SHA-256: 3135b687fc7ae843dfec081f05b5f59d5af18c0ddce1fadd0a72ce1185adfcea
font_01_sfnt_off00005ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE3 19716 bytes
SHA-256: 144e1602c54c458f90dc2608326e8247c1e3de380bfd165d9cbc438969e7ad80

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