Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6654146efd74f5…

MALICIOUS

PDF

37.9 KB Created: 2021-05-23 20:08:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2eb11088d4f52e36cab25f792261a621 SHA-1: dc66b9a98be858263921db9ca4be7e8c227df48c SHA-256: dc6654146efd74f54258dddd87f4bb4cd91c7612b4b37da853de50daa4b78795
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The document body also contains a prominent "CLICK HERE TO ACCESS TIKTOK GENERATOR" call to action, reinforcing the deceptive nature of the content. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

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-app-game-hack In PDF document text
    • https://123nhadat.net/upload/ckimage/files/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/free-robux-group_GM431946152.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • https://123nhadat.net/upload/ckimage/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002ef7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EF7 26608 bytes
SHA-256: 3ed95edb05334ff7bf05a23d8f8cff6426e75eae32ae68cae3a06fc77421bcaa
font_01_sfnt_off00006a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A59 2888 bytes
SHA-256: 2f5f0fc0bc2e44a39e81df338c202d2aa9228409b57f32fbedd5805dc83e19fa
font_02_sfnt_off0000744a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744A 17632 bytes
SHA-256: ea608747ff9a73a218f7ff90867c843845867270d7f940ccd5b7614aaec9a371

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