Malicious PDF — malware analysis report

Static analysis result for SHA-256 44212161090d69db…

MALICIOUS

PDF

45.3 KB Created: 2021-06-09 06:42:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f7bd67c6c6b13a6189fb7c752604bce3 SHA-1: a85dfb737d382d56ed90a542ab6da7735e42aa81 SHA-256: 44212161090d69db6c863b84da70cb831f5bcc9302237682ae4c3412bedf483a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The primary URL, https://netcdn.tw/app/431946152/free-robux-giveaway-pin-promo-codes-2021-game-hack, is flagged as malicious and part of a redirector chain. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector pattern, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/free-robux-giveaway-pin-promo-codes-2021-game-hack In PDF document text
    • http://firesafetyservices.biz/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/pokemon-go-free-spoofing-ios_GM1094591345.pdfIn PDF document text
    • http://firesafetyservices.biz/images/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/hacked-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-get-free-robux-no-scam_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
font_00_sfnt_off00005040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5040 24952 bytes
SHA-256: ab8dc407011e79cfacd08977873fa079b4d5b60228309576b357cec205e37e90
font_01_sfnt_off000089e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E4 19812 bytes
SHA-256: 46d288d02b38d56775036b12d6d610336bd45f50392c63d5ac7ce36b90f41acc

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