Malicious PDF — malware analysis report

Static analysis result for SHA-256 633189392e4c65bc…

MALICIOUS

PDF

42.6 KB Created: 2021-05-14 10:59:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b58ae11df72e8a2f7f4dae893f87becd SHA-1: 8a8a141908514a557ef8c921de131046b35ad2d7 SHA-256: 633189392e4c65bc6ad52536bc23c98d17c2b3309579d3b6dd488baebb20acc7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains and game-related lures, such as 'free spins' and 'game hacks'. The heuristic firings indicate these links point to malicious redirector infrastructure. The document body and embedded URLs suggest a social engineering attempt 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/how-to-get-free-daily-spins-on-coin-master-game-hack In PDF document text
    • http://parsbaft.com/images/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-pics_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/install-coin-master_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://parsbaft.com/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-official-website_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c42.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C42 25124 bytes
SHA-256: 71b8840797d0ff013368f985830f9d95a82db25925ef5ddfa12f959aa7ca957a
font_01_sfnt_off000083a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A6 18472 bytes
SHA-256: 16a7f242fb8c09a8aee24ffe7eff7301392850b549ae588808710575930a759c

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