Malicious PDF — malware analysis report

Static analysis result for SHA-256 daff7a1cef618a2b…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 15:21:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ed5977ae59e855b124e969c77a8b5ebe SHA-1: 6a5044f33e196ca3b35756deed61d61e0d7db9e8 SHA-256: daff7a1cef618a2b64f1c4d1ac72ce1b0f2acec2d7414dc8c87d07623c327d39
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'free generator / game hack' lures. The primary redirector URL is http://netcdn.tw/app/406889139/master-coin-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at tricking users into visiting malicious sites, likely for malware distribution or credential harvesting.

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/406889139/master-coin-free-game-hack In PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-game-nocopyslocked_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/roblox-devil_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-with-fake-account_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-card-codes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-promo-codes-list-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-hack-roblox-and-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-use-free-robux-cheat-codes_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-magnet-simulator-hacks_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-free-gift-card-org_GM431946152.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_off0000334c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x334C 22908 bytes
SHA-256: 92e156e8005f4460514a26899f09655a9dea46f5dee985cf68af3129fdbcfa90
font_01_sfnt_off000066bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BF 17996 bytes
SHA-256: fa851caa7f63d89d5125b361ad8af841500573ce2358cce74b5d769b3240620f

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