Malicious PDF — malware analysis report

Static analysis result for SHA-256 85c5028cfe513297…

MALICIOUS

PDF

42.9 KB Created: 2021-05-16 05:19:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 006d1c3a784359a287976eeb770948cc SHA-1: 339b94265f37ca26bbec9e29ff276fd3b67f0897 SHA-256: 85c5028cfe513297182e6efde6864026842911de84799de804fe64dfdabd98bd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The heuristic firings indicate that these links are designed to lure users into clicking on them, likely leading to further malicious content or downloads. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/coin-master-mod-apk-latest-hack-with-unlimited-free-spins-game-hack In PDF document text
    • http://5prudov.ru/images/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://5prudov.ru/images/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://5prudov.ru/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/free-minecraft-mods-for-ps4_GM479516143.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_off00004886.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4886 25396 bytes
SHA-256: 6e79b2e37c342b3f6169758bbf3f903be1385bc0bc0752d3296d18afebac605a
font_01_sfnt_off000082e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82E5 19116 bytes
SHA-256: ec39511f044db0039b033061d0c06de0ea4b06e85abf4e03074bae323e4248a1

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