Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de7fa422b8842c1…

MALICIOUS

PDF

42.4 KB Created: 2021-05-17 16:02:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 95cadebf38582362c936a98e61dc9aa1 SHA-1: 02008f5e3955e82f3d06761779997691b6ebc100 SHA-256: 7de7fa422b8842c1bb0eff0e1aff78e88b36d6b2a2900cd5193b69b4cc19136e
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and SEO-optimized PDF files, all related to game hacks and free currency. The primary link leads to a 'free generator / game hack' site, indicating a lure for potentially unwanted or malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/free-daily-spins-coin-master-game-hack In PDF document text
    • http://vedrachemicals.ro/images/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-rewards-app_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_off00004a7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7D 24936 bytes
SHA-256: ae98774b913c2169141c9b455f9c6b74c0f0277eb82dc5e03dcd3e0caaf04262
font_01_sfnt_off00008328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8328 18308 bytes
SHA-256: 55eaac4e6bbee5e06de7435d22c867d27a3c8151a397b13177f5239675c95764

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