Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12516398872b8e5…

MALICIOUS

PDF

35.4 KB Created: 2021-05-21 13:07:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f93220e03715f421811d3b8f19547042 SHA-1: 84a680188221202c875ad425220aff27e37bab50 SHA-256: a12516398872b8e53deac4c5fbe6cc1a6f1a7731c72d761a906b07c9eb97b9ed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of free TikTok likes and game hacks to trick users into clicking malicious links. The document contains multiple embedded URLs pointing to redirectors and other potentially malicious PDF files, indicating a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious, increasing confidence in its harmful nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/buy-tiktok-likes-free-game-hack In PDF document text
    • http://unc-europe.com/images/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://unc-europe.com/images/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://unc-europe.com/images/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://unc-europe.com/images/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://unc-europe.com/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30AF 24748 bytes
SHA-256: c6c5d0484655ec747795700cf3ada1b9beb086307f548bbff70256c0b387db0e
font_01_sfnt_off000069ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69AE 17992 bytes
SHA-256: 5a285995f939c82fe8a421920004d2da3f98bfe29c016a707c824504500d0912

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