Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12c0173068fdbf8…

MALICIOUS

PDF

33.4 KB Created: 2021-07-02 01:46:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4d1c441e4ffe2bb7d7c194520510e0a5 SHA-1: 7d3b8ea807116b1a7d3eac2ffb0faac05f0751f7 SHA-256: a12c0173068fdbf8375bff50e5681576b06b952bf5e217accd645dbb4adbb88d
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to a known malicious redirector, that promise free game hacks and generators. The document body and heuristics indicate a lure for users to click these links, likely to download malware or engage in phishing. The presence of multiple SEO-optimized PDF links suggests a link farm designed to attract traffic and potentially distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-roblox-dlls-game-hack In PDF document text
    • http://111.68.26.74/widyapustaka/repository/minecraft-pe-free-download-android_GM479516143.pdfPDF link annotation
    • http://111.68.26.74/widyapustaka/repository/rbx-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-tower-battles-hack-script_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-gen-no-verification_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/hack-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-muscle-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/hacks-for-rocidisons-on-roblox_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-a-rank-on-roblox-groups_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-roblox-hack-for-apocoleps-rizing_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/easy-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/explaining-video-free-robux-and-diamonds_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/google-site-roblox-hack-get-free-robux-right-now-online_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/citizen-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://111.68.26.74/widyapustaka/repository/robux-hacks-2021_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_off00002cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF2 22324 bytes
SHA-256: 077f834d741574c60a01744a98896d850f5bde17466705793501dbbde47d4e7b
font_01_sfnt_off00005e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3A 18816 bytes
SHA-256: 841723abf094694cccd1901a94a78c8de54716e21ec1ad9a81e33b87d6ecfba7

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