Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd41a0ab6457efb…

MALICIOUS

PDF

34.5 KB Created: 2021-05-21 18:47:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 494e73991ce8e5243d915d4541a2288c SHA-1: 503a1af96b86099dd2c5ad4c173043d528f07d41 SHA-256: dbd41a0ab6457efbdfb829cfbc83854b21b53725a7417ff8b28a36fa7c095878
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' or 'game hacks' to entice clicks. The primary malicious URL identified is https://netcdn.xyz/app/835599320/tiktok-followers-free-no-verification-game-hack. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9505

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/835599320/tiktok-followers-free-no-verification-game-hack In PDF document text
    • https://mbbs.hr/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-robux-on-mobile_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_off00002e7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E7D 24660 bytes
SHA-256: a050a5705fb196f3e8fe3a4ab4c74a90b8e6f1683be16c88d7d31fb5a5143499
font_01_sfnt_off00006612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6612 18056 bytes
SHA-256: ceabaad675fb6f706351d12801dd333de9ba2d5e561fbfb57734fcc9d641e1bb

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