Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9eda2bc3d07ebd…

MALICIOUS

PDF

36.4 KB Created: 2021-05-21 15:03:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cc0bcba8aa182b8b8ba3ec87c2e67f68 SHA-1: d7d1354e9d9366e362cc29db4274f90317cf63b9 SHA-256: 1a9eda2bc3d07ebd8ede3ba75985e1b7293200f53f4a7e607f8ed35bc0b306cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'free likes on TikTok' and 'game hacks'. The document body also contains a prominent call-to-action to access a TikTok generator. This indicates a social engineering lure designed to trick users into visiting malicious sites, likely to download further malware or engage in credential harvesting.

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/free-likes-on-tiktok-no-verification-game-hack In PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-hacks-free-spins_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_off00003044.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3044 27084 bytes
SHA-256: ac41eb65b471f3a8d8e02b9e8dfd3ed3fd4d35a92cf2aeea368913b9fb2fe083
font_01_sfnt_off00006e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E48 17816 bytes
SHA-256: 589fcfe1de1caf68ef089dfb8e48f20b64e47950833209f6cee198fde2e4bcf6

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