Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2946a8d76113a7…

MALICIOUS

PDF

34.2 KB Created: 2021-06-20 12:17:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b2958faa15a49f210e560345dcd9f8ea SHA-1: fb8993a0d1f447778ed887a676c7428dee6aafbb SHA-256: bd2946a8d76113a7aa818e07c40d8620327b80e761a5ea79916fceb8990c1868
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to a malicious URL. The document body also contains this URL, reinforcing the lure. While no scripts were extracted, the presence of a malicious redirector strongly suggests the intent is to lead the user to a site that will likely attempt to download further malware or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/cheats-roblox-high-school-game-hack In PDF document text
    • https://www.sarsen.net/uploads/files/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/est-il-facile-de-hack-sur-roblox_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-builders-club-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/proxy-download-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-50-robux-free_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-free-pokeballs-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-robux-hack-2021-ios_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3145 21812 bytes
SHA-256: fb3dfb71cb4ca6aadf2c9a96b9014d4812c57f1c63404bde87f2ee76a5b4659e
font_01_sfnt_off0000611d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611D 18876 bytes
SHA-256: 057abb812b0450a445d10251b2949e342968b757bba01e1a397a196136a00890

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