Malicious PDF — malware analysis report

Static analysis result for SHA-256 36db183df4d5b546…

MALICIOUS

PDF

35.5 KB Created: 2021-05-22 19:28:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2289bf9f80e5f3b0250a1332eca19a75 SHA-1: 48ee2ea64be7fafbe1066c12db7446f706e1ce16 SHA-256: 36db183df4d5b54682bddf2e3fe886cb82f08922c69bd3c0ca1f64b204788275
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains that host lures for free followers or game hacks, indicating a phishing or scam attempt. The document body and heuristics confirm the use of these lures to entice users to click on malicious URLs. No scripts were extracted, but the presence of embedded URLs and the nature of the lures strongly suggest a phishing attack.

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-verification-or-survey-game-hack In PDF document text
    • http://lookpaineis.com.br/images/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://lookpaineis.com.br/images/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://lookpaineis.com.br/images/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://lookpaineis.com.br/images/coin-master-hack-xyz-download-free_GM406889139.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_off00003050.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3050 24556 bytes
SHA-256: 12e7dbc26d6071682e760812a2e9032c9e2d1f73dbb84bd4cd4061a4732f86ac
font_01_sfnt_off000068b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B4 18492 bytes
SHA-256: 4d8c0727d58b59d2b63319bab821bc095baa93826ac3da826e0a8bde5531d4a4

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