Malicious PDF — malware analysis report

Static analysis result for SHA-256 456eab36b8122e27…

MALICIOUS

PDF

35.0 KB Created: 2021-05-25 11:02:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0a2b043f572df565acfad16a6b47b14a SHA-1: 7da2e11fae48b5daa889c28f6420d18eb3aa858d SHA-256: 456eab36b8122e27683740f7dc3b3f457a1b57ded7f872bd710fe88f138c0ac2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, masquerading as 'free generators' or 'game hacks' to entice users. One primary URL, https://netcdn.xyz/app/835599320/free-tiktok-followers-no-downloads-game-hack, is flagged as a malicious redirector. The document body also contains numerous links to other PDF files hosted on 'astdubai.co', suggesting a chain of malicious lures. The presence of embedded URLs and the lure of free items strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/free-tiktok-followers-no-downloads-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/toolbox-premium-apk_GM479516143.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_off00003022.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3022 24304 bytes
SHA-256: b4108307a0fa145c9e8446df1a88c4f5472631d76f842cbdb04d629a7cad6b11
font_01_sfnt_off00006778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6778 18264 bytes
SHA-256: d5c5ec98edba9b40f9bc8010b923702a5e25c64ded77377ab4934560472c0c7c

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