Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d5583c580b8166…

MALICIOUS

PDF

43.3 KB Created: 2021-05-12 11:37:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0de1850b4046ceaef414a519daa51f87 SHA-1: c0125d1a94c0e0d282f97bf08dca9005ea7a2f0e SHA-256: c1d5583c580b81662ee05b3f5132904bf7159425487f31502e6fa4050b4f05dc
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document body contains obfuscated text and numerous SEO-optimized PDF links, indicating a campaign to distribute potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/microsoft-rewards-robux-game-hack In PDF document text
    • http://www.visiblefilm.com/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://www.visiblefilm.com/images/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/oprewards-login_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_off000048bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48BB 26628 bytes
SHA-256: b82e7f5c53e8e1ff0df0e25a96732416d9bc3e3c56a85fe063d24775524df540
font_01_sfnt_off0000852c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852C 18836 bytes
SHA-256: d76d5b6db0d4e4705444aa8851d1d4c6cd7560e5eeba0f606c105a883c005607

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