Malicious PDF — malware analysis report

Static analysis result for SHA-256 254ffca81be7d99e…

MALICIOUS

PDF

48.3 KB Created: 2021-06-09 01:46:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f41120891346748d81fb7b3ef377370d SHA-1: 9dbea0c37d36831445f578245df18536ffa666ff SHA-256: 254ffca81be7d99e201c8b413fff48a2f2864cec0fc0f387f2295d96b61ae9e2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures related to game hacks and free currency, indicating a phishing or scam attempt. The document body and embedded URLs suggest a social engineering tactic to drive traffic to potentially malicious content. No scripts were extracted, but the presence of multiple malicious links and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/dantdm-shirt-roblox-free-game-hack In PDF document text
    • http://nalmpantistractors.gr/images/give-me-robux_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-roblox-cards-not-used_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-tiktok-coins-2021_GM835599320.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • http://nalmpantistractors.gr/images/free-robux-just-enter-username_GM431946152.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_004_off0000526d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x526D 25800 bytes
SHA-256: c9f30c5f28a6eba4d951830cdd02011427d3ec96ca5d9a89be6532dea3225ee6
font_01_sfnt_off00008da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA2 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000978c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x978C 19168 bytes
SHA-256: 80099d53d0dd124b6c346e1242dad5616b070140cc0497ece4d26722a2be3c2a

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