Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd545ae481ef395…

MALICIOUS

PDF

44.8 KB Created: 2021-06-10 13:44:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2570905e302decf8771e876ac37f935e SHA-1: 30cf5015a22c9e42045c76ab22924567cf6ccb35 SHA-256: bfd545ae481ef39569fa7007ccca621ecceb715e73c761b78fdcb12a48882d08
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure to trick users into clicking a link for a 'free generator / game hack'. The link redirects to a malicious infrastructure that presents a fake CAPTCHA or human verification prompt. This is designed to coerce users into performing actions that could lead to further compromise or execution of malicious code. No scripts were extracted, but the document's structure and embedded links strongly suggest an attempt to exploit user curiosity for malicious gain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/robux-club-roblox-online-hack-game-hack In PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/tiktok-freepik_GM835599320.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-roblox-exploit_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/100-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stifar.ac.id/repository/strucid-hacks-roblox_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_004_off00004e8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E8E 27448 bytes
SHA-256: ef872a8277d7066c1a8576e31969a6c9ea8758f1d98e564ea8dddd65518e0751
font_01_sfnt_off00008c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C1E 18444 bytes
SHA-256: 45e1be091dd2a887d1413aff284dbc66baa5737ae28f7e9d19d8971b50e96ec1

Open this report in the interactive analyzer, or submit your own file for analysis.