Malicious PDF — malware analysis report

Static analysis result for SHA-256 430b6e0beb575183…

MALICIOUS

PDF

41.9 KB Created: 2021-05-12 23:37:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e0898496f5a2073996c9b1f41f7c5703 SHA-1: 21faa83f65977c67bb7b57acdbee4cce395486ff SHA-256: 430b6e0beb5751837523ffd2679ccc14e589c99997b7b0d1bedd399051b093c1
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to external websites, including a known malicious redirector at `https://netcdn.xyz/app/431946152/hacks-roblox-game-hack`. The document body and heuristics indicate a lure related to game hacks and free in-game items, designed to entice users to click these links. The presence of numerous links to PDF files hosted on `stikesprimaindonesia.ac.id` suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the overall structure points to a phishing or redirection attack.

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/431946152/hacks-roblox-game-hack In PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://stikesprimaindonesia.ac.id/perpustakaan/repository/robuxy-com-free-robux_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
stream_003_off000049d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D6 24256 bytes
SHA-256: 5cd7b89df4a84ed6a51c1454e616ce370e7fadb41a20d017ca84a79d10f8d224
font_01_sfnt_off00008170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8170 18184 bytes
SHA-256: 7ce99462d7db30d9d686f16fdffa062e1f918298e62a3f0da8fa4bf2d2fabb79

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