Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c8cfbe3705b34e…

MALICIOUS

PDF

50.4 KB Created: 2021-06-14 01:41:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 48664717a07b85bd266e6db0e81f661d SHA-1: c0a406960aa0d0c7bd5e11c1e9ded9c736e3359d SHA-256: 29c8cfbe3705b34e96911a44b602b76b332f0fe3db82d4eb71a6aacd7e8eef47
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple external links, including one that redirects to a 'game hack' lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. While no scripts were extracted, the presence of numerous embedded URLs and the lure suggest a potential phishing or redirection scheme, possibly leading to malware download or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9349

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/best-hacker-noob-roblox-avatar-game-hack PDF link annotation
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/roblox-builders-club-free-codes_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/is-tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/how-to-cheat-in-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-human-verification-and-survey_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-robux-hack-prohosts-org_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/how-to-get-a-hacker-banned-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/protosmasher-with-workspace-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/all-free-skins-on-roblox-for-2021_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-followers-roblox-generator_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-roblox-exploit-injector_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/roblox-hack-accounts-password-2021_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/how-to-get-free-robux-using-inspect-element-2021_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/free-robux-hack-today_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/how-to-get-free-clothes-no-robux-of-freinds_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/how-to-get-free-clothes-on-roblox-2021-without-bc_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/how-to-get-free-robux-ad-on-youtube_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.racoh.edu.gh/wp-content/uploads/fsqm-files/robux-hack-2021-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D74 31592 bytes
SHA-256: 12e90fe926051d47437a6b4d186089a4453a921a1833f972c6b52a05b4313411
font_01_sfnt_off00009889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9889 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off0000a23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA23A 18400 bytes
SHA-256: 622835c0962b15326b08b8870e7df11321f6d294c6b23857dfc713fa8b88ca14

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