Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba9f05348db5e00…

MALICIOUS

PDF

34.4 KB Created: 2021-06-27 10:51:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a88b26f1530745c5cfc701a1baa84330 SHA-1: ac582bc65ee65f4902c4021f55ccfb6fe867c367 SHA-256: dba9f05348db5e0060cf4a138769357b8109f4fe0740871575192b7f7766c4f0
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games. The presence of a malicious redirector link and a large number of SEO-optimized PDF links indicates a campaign to drive traffic to potentially harmful websites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam lure.

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/free-tix-and-robux-website-game-hack In PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/new-free-level-6-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-shirts-in-roblox-catlog_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/spin-coin_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-op-weapons-in-your-hack_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-hack-peoples-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-i-got-hacked-again_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hacked-accounts-of-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-roblox-shirt-templates-free-shipping_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-generator-2021-no-human-vrification_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-roblox-account-with-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-coins-coin-master-link-2021_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
font_00_sfnt_off00002f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4D 22168 bytes
SHA-256: 15af72a455d3a1652dd54d58fffdb69d05a26bb958625816dbb95c0971e8d2c7
font_01_sfnt_off0000608c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608C 19312 bytes
SHA-256: 9817d27024e548dfa6b6ef6e4d36d626d8be483481c7a0f68914cdd005576429

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