Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaafec9aea9699b5…

MALICIOUS

PDF

45.4 KB Created: 2021-05-20 13:33:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 95e8cb5085da8565bed1c8178b9d3ac6 SHA-1: dcb05071a9d6981326cb462cdc8f9b64953b1da7 SHA-256: aaafec9aea9699b53845ff997ef3126e32831efe9d8e2f5b6e69c4ae9ff390ed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, one of which is identified as a malicious redirector for a 'game hack' lure. The document body also contains a prominent call-to-action to access a 'Coin Master Generator' via a URL. These elements indicate a phishing attempt designed to trick users into downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7826

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/406889139/coin-master-daily-free-spins-link-today-game-hack In PDF document text
    • https://www.omgtours.com/images/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.omgtours.com/images/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.omgtours.com/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.omgtours.com/images/free-draw-roblox_GM431946152.pdfIn PDF document text
    • https://www.omgtours.com/images/tiktok-free-no-download_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000375f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x375F 24596 bytes
SHA-256: bc1f19f23882a62803b00eca24dd28f3e605f771e0871e51e03870ccc04d7f24
font_01_sfnt_off00006f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F29 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00007a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A27 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_03_sfnt_off00008eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB1 18652 bytes
SHA-256: b7acebacf47409c7f0f2932ba41e4c1dc120b4ef5280387cf9333091bd47b2e0

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