Malicious PDF — malware analysis report

Static analysis result for SHA-256 8678faa3f132d037…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 07:27:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 471aaf383cd5e9f079a34d1cd889d09f SHA-1: badda9ee6ff601c226cb490207a7866d17745d1e SHA-256: 8678faa3f132d037ce5bfbfadcfcd89170ae26d5a399f0bcb2b164b4f3fe9e49
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to sites offering game hacks and cheats, such as 'how-to-download-minecraft-for-free-ios-game-hack'. One of the embedded URIs points directly to an IP address, indicating a likely attempt to bypass domain-based security measures. The ML classifier also flagged this PDF as malicious with high confidence.

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.tw/app/479516143/how-to-download-minecraft-for-free-ios-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/ahjefhz-roblox-hack_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/hack-proxo-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/bloxbird-roblox-franais-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/earn-5-robux-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-card-codes-for-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-on-hp-laptop_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-heads-in-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-spam-without-notepad-and-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/stella-beta-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-co-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/como-hackear-robux-en-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-watching-adds_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/getgaming-resources-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-hack-real-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-catalog-hack-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hectic-plays-free-robux-form_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/prisonj-life-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
font_00_sfnt_off000031ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BA 22268 bytes
SHA-256: 40605e24c93bf71e8cc69ee089f604e6e4da3b99b2f8eefb8a1fa2f514e33ff5
font_01_sfnt_off00006338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6338 18576 bytes
SHA-256: 3e1136ec464d3bc1fda9ba7dd324a7175972f48092c1816aca3366f53a9db50b

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