Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0e13b93e757d21…

MALICIOUS

PDF

37.1 KB Created: 2021-05-21 10:33:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a0a445d7b53af983c6ee9e8246f276d7 SHA-1: 4757e19e5557267a4eb9973b432d97f300cef887 SHA-256: 0b0e13b93e757d2186cf6d31b86928ad4794f7bd024db979105211f9b127ffef
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are identified as malicious redirectors, specifically promoting 'free generator / game hack' lures. The document body and embedded links suggest a phishing or scam attempt, aiming to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings strongly indicate a malicious intent to redirect users to exploit or scam pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • 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.
  • 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.xyz/app/431946152/get-free-robux-com-game-hack In PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/coin-master-hack-for-ios_GM406889139.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/roblox-jailbreak-hack_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_002_off000034c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34C4 25360 bytes
SHA-256: 4ec12769f99d5293623824312cbd216b7b10401cccdb068a9cc754b0ccaa0cbf
font_01_sfnt_off00006f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4E 18376 bytes
SHA-256: 2d8882c6a342abc4889e46f94bfee9f8cbf5538b2f5dc41d172000db9622f481

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