Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab741cfdef7027b…

MALICIOUS

PDF

34.5 KB Created: 2021-05-22 20:19:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5542d9f567b2ca20e264c2bc1ae92e27 SHA-1: 3cbfbe73ae6ed4f6a44c1dcf160c9baf5f0fcdcd SHA-256: fab741cfdef7027bee74ae26be2f082ba3b9c1e0b528d7166c925d0700aa6c47
160 Risk Score

Malware Insights

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

The PDF file contains multiple links, one of which, 'https://netcdn.xyz/app/835599320/free-tiktok-followers-app-game-hack', is identified as a malicious redirector. The document body also contains similar lures for 'free Tiktok Followers App' and 'TIKTOK GENERATOR', suggesting a social engineering tactic to drive users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a malicious redirector is embedded, likely leading to further compromise.

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-app-game-hack In PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/level-coin_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off00003314.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3314 22932 bytes
SHA-256: 0d591ac7b075bcafda709a9d0562512b7b6e4722d910220fd2c8c20292ea0a90
font_01_sfnt_off0000669b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669B 17872 bytes
SHA-256: 34129f1c56e014fb2604607ed740d581eed4f4cd55f156cb19b3173e06165e4c

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