Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7c5abf54b42359…

MALICIOUS

PDF

38.9 KB Created: 2021-05-21 15:20:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e113d05fad15d5cdc9e3a24e5ac1eb5c SHA-1: 07849d21bd2fdaf0ad5f6ef3b8481174f7767133 SHA-256: 3e7c5abf54b42359a677d8bba67254f1154aa674e425c4c1e4befd9f85384b84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games. The document body includes a call to action to access these generators, reinforcing the lure. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a malicious redirector designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/479516143/minecraft-creative-mode-free-game-hack In PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/roblox-generator-com_GM431946152.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003465.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3465 25272 bytes
SHA-256: b6da2ed2ae914fec03891f8893186b797d7c62100f5bd4579e2eb983d6239f5f
font_01_sfnt_off00006de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE4 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00007784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7784 18000 bytes
SHA-256: f6a8cbfed7e544a7ed90cd1995fc8c45102f25219f8fae40911eda120a1a4630

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