Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c5eb588364594f…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 10:02:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6303431d6da5dd8a7880232f15676fb1 SHA-1: 9bb68642a4ce6840457bcfeb131aa567592ac84a SHA-256: 34c5eb588364594fcfb5d4fc908e614b74265af2c7f1808bbe56bb4c1fb97a97
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous external links, identified as a link farm, with lures related to 'free Robux' and game hacks. The primary URL directs to a page promising 'free Robux picture game hack'. The document's structure and content strongly suggest a phishing or scam attempt designed to drive traffic to malicious or misleading websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/free-robux-picture-game-hack PDF link annotation
    • http://library.persadabunda.ac.id/repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spin-bonus_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_off000050bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50BF 24180 bytes
SHA-256: ed575719d73251acb9809fd4a1398bde86babeb8f159cb9c1f4a55f1e86b0aa8
font_01_sfnt_off00008692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8692 18392 bytes
SHA-256: 34b0e3a58c66b2af54b16d5c8d734c4555ce81663a4a6734022a64244545498a

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