Malicious PDF — malware analysis report

Static analysis result for SHA-256 9097a733d2d428d6…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 23:39:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e713cc924797a681a5597fecdb8bba05 SHA-1: cd93dc3e9f110aa970fb5bc32e2d012bca0457ac SHA-256: 9097a733d2d428d61fd543d4319dc18d95329f6ba6c165111fb58e290fe5e9b6
200 Risk Score

Malware Insights

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

This PDF document employs a lure of free game hacks and generators to trick users into clicking malicious links. The primary link redirects to infrastructure known for hosting malicious content, which in turn points to further lures disguised as PDF files. The document body and heuristics indicate a clear intent to drive users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/how-to-make-free-robux-game-hack In PDF document text
    • http://mbbs.hr/files/roblox-steves-one-piece-hack_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/aesthetic-roblox-outfits-free_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/original-roblox_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-lumber-tycoon-2-hack-windows-6_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-et-free-faces-on-roblox-easy_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-hack-roblox-using-cmd_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spin-today_GM406889139.pdfIn macro / runtime command snippet
    • https://mbbs.hr/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-spIn macro / runtime command snippet
    • 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_off00002c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C78 22152 bytes
SHA-256: 3c87c771094860acaf35e5b59f1310835889482c4f3492f57c07ee45e370e1ab
font_01_sfnt_off00005daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAF 19244 bytes
SHA-256: 6b22af1083df9260d35a8428a36ac91eb4c7dbc1159f4e02fe88489ba0efcc00

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