Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe8d27fdb50f379…

MALICIOUS

PDF

34.7 KB Created: 2021-06-18 23:00:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 211eb4b616be69c59c19b43a5f0b23b3 SHA-1: 1aa18b655697070517eed9a44f7130ee4b09871d SHA-256: 5fe8d27fdb50f3799e9f60cba3709628db8421d175522ed989e13eec6a8ec67b
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to lure users with promises of free game items and hacks, directing them to a malicious redirector and a large number of other PDF files. The document body and heuristics indicate a scam or phishing attempt, likely to lead users to further malicious content or potentially download unwanted software. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-a-free-umbrella-in-camping-roblox-game-hack In PDF document text
    • https://www.manmed.info:443/images/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-download-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/hack-de-robux-100-real-imfinitos_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-gift-card-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/roblox-hack-btool-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/cheat-roblox-retail-tycoon-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-no-human-verification_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_off000030c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C9 22016 bytes
SHA-256: b3a4af02e8ebd543e4264fc136ab67c8d1f6cfdc0f310e21a568ab5b49af0e83
font_01_sfnt_off0000616f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616F 19472 bytes
SHA-256: d244f8e59f5d5dd227888069a41f4f9532187b4b156dceb53fc0314ab22e6c0e

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