Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcfb300aec397322…

MALICIOUS

PDF

42.8 KB Created: 2021-05-13 01:10:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b6a9b033f14a0823116ed520f5686445 SHA-1: 07e2615c2fe0e8602102bb607f32b3daedebf910 SHA-256: fcfb300aec397322617aa8b06dbbf5e559ebe398452c9cf6d692e0bb270ba37f
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains links that impersonate popular brands like Facebook and Minecraft, luring users to a malicious redirector. The document also instructs users to copy and paste content into a shell, indicating an attempt to trick them into executing commands. While no scripts were directly extracted, the presence of malicious links and the social engineering tactics suggest a phishing or credential harvesting attempt, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/479516143/minecraft-survival-free-game-hack.
  • 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 https://netcdn.xyz/app/479516143/minecraft-survival-free-game-hack In PDF document text
    • http://mohacad.com/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://mohacad.com/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • http://mohacad.com/images/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-coin-master-game_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
stream_003_off00004b3e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B3E 25876 bytes
SHA-256: bc456989988128d42128546f9ac9a8c870594f9afefa53596085432e1aa2c9a8
font_01_sfnt_off00008644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8644 17896 bytes
SHA-256: ae22d75e7686c6a225539c41209adbc632e29a8ac914593cbcf88605996e660b

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