Malicious PDF — malware analysis report

Static analysis result for SHA-256 41d443a7d8996281…

MALICIOUS

PDF

34.9 KB Created: 2021-06-19 05:11:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2a5168b70a7d28a18e6a50f11d79e80f SHA-1: 5c29e456e4f844930a9da49fd75f5a7abb177004 SHA-256: 41d443a7d89962813d821ac5792054b3d45b2281839f026fadba43e6d03e9440
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a known malicious redirector, disguised as a generator or hack for popular games. The document body and heuristics indicate a lure for free in-game items or currency, a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content.

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/ash-greninja-free-shopping-in-roblox-on-roblox-shopping-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/https-enhelprobloxcom-hc-enus-articles-202120210myaccountwashacked_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/top-best-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/forum-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/pokemon-go-free-150_GM1094591345.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-in-roblox-jailbreak-noclip_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/more-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
font_00_sfnt_off00002ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF1 22700 bytes
SHA-256: 5cfccc9416138ee6f6e3fd741948b21de89830b07ae26772c3ecf24b0c5de225
font_01_sfnt_off000062da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DA 19300 bytes
SHA-256: 503bab683bc04c671d87d12bad57ae8d749e50cc22437c04cc1f607e6518b8f8

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