Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ef73f58d1cb416…

MALICIOUS

PDF

43.0 KB Created: 2021-05-14 07:40:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b7d373b39aff68345f910a37503e755f SHA-1: 7fcc99cabfe7ef948ad99ac7b203c51aec192ead SHA-256: 75ef73f58d1cb416702909a5255aad12ff097aedd2af5291d5508bbe8f988cff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The heuristic firings indicate these links lead to known malicious redirectors and are designed as a lure. Although no scripts were explicitly extracted, the nature of the links suggests a potential for downloading further malicious content or redirecting to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/minecraft-hack-client-download-game-hack In PDF document text
    • http://taskcyg.nl/images/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/oginject-co_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/level-coin_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/robux-com-free_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
stream_003_off00004c3f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C3F 25188 bytes
SHA-256: 30b678d35b36b9e58363fc2a201555a595f5e3d674996a25d289b9c9504c30eb
font_01_sfnt_off0000852f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852F 18460 bytes
SHA-256: f0322949221cc4e2c5002b867d751862f4cd6735e4a5ba01a0e5101b475bc55e

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