Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6bae7c88ef36aef…

MALICIOUS

PDF

34.0 KB Created: 2021-06-20 05:07:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5b23cf32e3eb547e1ff56eba711007e6 SHA-1: ef5cef080408d4e9cc10286a69bef9c2c023fc19 SHA-256: b6bae7c88ef36aefa5583c3f18a38174c20d7f781c1252762db8b033c671670b
180 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, including a known malicious redirector, that point to further PDF files hosted on an IP address. These links are designed to lead users to potentially harmful content or further stages of a malicious campaign.

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/free-admin-roblox-game-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-no-verification_GM431946152.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-robux-for-free-in-jailbreak_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-use-free-models-in-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-clothes-from-catalog-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/pubg-770-uc-hack_GM1330123889.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-cheats-for-name_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-group-may-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/coin-game_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_off00002fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FBF 21644 bytes
SHA-256: 064542cee80d6cc75c55c5c78fad35db3e277c6e0c3fb183fb7e3c688e73e880
font_01_sfnt_off00005f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F87 19204 bytes
SHA-256: f00983806de2e020827adeb0ad6b87ad48ad1bc68267e9d997ce98c3299edf5a

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