Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f58344dda0ef73…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 12:54:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3d8c670d71232a98e0dd75cbc2914a16 SHA-1: c2a4701c8fe1d9e7bc3b8bb8f2b3f1d10af2fb8c SHA-256: a3f58344dda0ef7313b71831d5f134930c2ee33738b4b526e8c5ca753a766bb9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and currency to trick users into clicking malicious links. The document contains multiple embedded URLs that redirect to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirection workflow, likely intended to lead users to further exploit or phishing sites.

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.tw/app/431946152/but-link-says-free-robux-game-hack In PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/follower-generator-free-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-immortal-hack-blood-of-iron_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/can-i-download-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-roblox-level-7_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-avatar-free-items_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/earn-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-surf-hack_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/bug-free-uniform-of-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/earn-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/infinite-robux-for-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-hack-com_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_off00002dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFA 21936 bytes
SHA-256: 1f350a86f97a72b0a8c0bdda4a1c220994cb9a256abeee0664a819a8a82c00b1
font_01_sfnt_off00005ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA8 19292 bytes
SHA-256: 85e89077dd7519a4f4a641b8f2e0513bf80b3f407ef760b68c8b6f40ad995aa9

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