Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f897c39494321d…

MALICIOUS

PDF

42.8 KB Created: 2021-05-12 00:46:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c735581f8bffd692d9bfef20cf09c71d SHA-1: 6c5a766cc84d4d2200d21b8e40f9a9b6beda0dc6 SHA-256: c5f897c39494321d76b6a00b3917d297d4d3c704925961ca5693bc69d3c7a01a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting game hacks and free currency generators. The primary lure URL is https://netcdn.xyz/app/406889139/free-google-play-promo-codes-coin-master-game-hack, which is associated with malicious redirector infrastructure. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful 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/406889139/free-google-play-promo-codes-coin-master-game-hack In PDF document text
    • https://www.donjastubica.hr/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/roblox-skin-free_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-hack-apk-2021_GM406889139.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_off000049b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B3 25528 bytes
SHA-256: 5e9b6a33854276c3981a063b559a2688d2cff75ddf4ce7c5c63f7bdf3e64dbd3
font_01_sfnt_off0000836c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836C 18840 bytes
SHA-256: 390da4ab381e5da0f3a1dba4b04518bf56609a6cb8a6a234a2d345ffc47ec2de

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