Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae44731a9da084e…

MALICIOUS

PDF

51.5 KB Created: 2021-06-07 13:59:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fe3c5bfd0a6abbb97c999f9b5d7e1838 SHA-1: d61874528afcb8a5eb51f28bad8a6dc220251c13 SHA-256: 6ae44731a9da084e4ab03a680592dc00733fa3832e2b99d982a4595171a2cf3b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks or generators. These redirectors, in turn, host other malicious PDFs, indicating a multi-stage lure designed to trick users into downloading further malware. The ML classifier also strongly flagged this document as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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/best-roblox-free-building-games-2021-game-hack In PDF document text
    • http://iedarelief.us/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/roblox-hack-get-infinate-money-on-bloxburg_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/make-free-robux_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • http://iedarelief.us/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://iedarelief.us/images/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://iedarelief.us/images/free-tiktok-likes-app_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_004_off00005069.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5069 36580 bytes
SHA-256: b53a6b552cd2d6358620ff72b4e55635d702ff3a90339e667daedb1ba4cc3040
font_01_sfnt_off0000a328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA328 19664 bytes
SHA-256: 848de37638c405c2360eb3504927f781644065d566cab0127d845a7b12c24370

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