Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f5b4c0a387bb21…

MALICIOUS

PDF

34.5 KB Created: 2021-05-23 00:45:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9ec6a6b1d5cb19b3f7256f8604788c49 SHA-1: 21149cba479da9d68716eedaed1d4d94b37a75c5 SHA-256: e2f5b4c0a387bb214995ea5b6ae6a6ecb731fe438bdba4ebb31026299839f8ae
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as offers for free TikTok likes or Robux. The document body explicitly mentions 'free tiktok likes' and 'game hack' lures, and includes a call to action to download. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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-likes-2021-game-hack In PDF document text
    • https://gimnaziya6.kz/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://gimnaziya6.kz/images/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://gimnaziya6.kz/images/how-to-get-free-robux-gift-cards_GM431946152.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_off00002d4b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D4B 25316 bytes
SHA-256: e6e03e4a1201b1d2e4ce1588b5f0a4b988844bfcf1f7957756766e3772e5bec1
font_01_sfnt_off0000669a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669A 17860 bytes
SHA-256: d258708121255352d461bbf2ed049085888c1bd8d2af1a740053385592fd2202

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