Malicious PDF — malware analysis report

Static analysis result for SHA-256 2314b7b2018fb0fb…

MALICIOUS

PDF

33.2 KB Created: 2021-05-21 20:05:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5d7796477872c0228f0fe8f295d48589 SHA-1: 8b34cce5e8cac3318bbfa14df8e96d2201365ae6 SHA-256: 2314b7b2018fb0fbef7c1a76b39f1d78b68590e3d4ba7fe09b18e36f2f0feb61
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free generator / game hack" and embeds a link to known malicious redirector infrastructure. The document body also contains phrases like 'CLICK HERE TO ACCESS TIKTOK GENERATOR' and a URL that strongly suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the heuristic firings indicate a redirection to malicious content, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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-likes-no-verification-game-hack In 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_off00002c18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C18 23576 bytes
SHA-256: 1aedce115a044bed81616956c84257c74e2e19384ff703ed2c9e558761c4ebc3
font_01_sfnt_off000061d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D9 17816 bytes
SHA-256: 0d9791923344f4c484a3a479b57194289bec4ecd3d9e0db265e7d4ab369825c4

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