Malicious PDF — malware analysis report

Static analysis result for SHA-256 281e49c3b62e0f4d…

MALICIOUS

PDF

35.2 KB Created: 2021-07-21 00:02:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 450aecf465024de35df057ce7aae469d SHA-1: 7b98e098323877197ce6336c9ace1683a66becc4 SHA-256: 281e49c3b62e0f4d76c1d739c2e52a735388e411358c6ae9ba7794eb389c0800
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising "free generators" for games like Coin Master and Roblox. The document body and embedded URLs strongly suggest a lure to trick users into visiting these sites, likely to download further malware or engage in credential harvesting. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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 http://netcdn.tw/app/406889139/coin-master-free-blogspot-game-hack In PDF document text
    • https://farwesterndistrict.org/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://farwesterndistrict.org/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://farwesterndistrict.org/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://farwesterndistrict.org/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://farwesterndistrict.org/images/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • https://farwesterndistrict.org/images/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • https://farwesterndistrict.org/images/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://farwesterndistrict.org/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://farwesterndistrict.org/images/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • https://farwesterndistrict.org/images/tiktok-likes-for-free_GM835599320.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_off00003135.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3135 23752 bytes
SHA-256: 2456ac1e81bbd896e9026f358afe68ad594dc69b36a7596393da593fb9bcf553
font_01_sfnt_off00006713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6713 18464 bytes
SHA-256: 3d1506adb004325b5ad849f11167115e1f90dbd1428f7e6d98779d75984a0c30