Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c06ea446b852093…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 02:16:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dbd8c351db5edb0eb069ae13f0586e59 SHA-1: 17ddc6bd2f0db342d1d22c0eac0b55e373632a66 SHA-256: 7c06ea446b8520931013ba2cb3462bbd2648ecd2d48e95eb94eb95db7cc0e09a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and other PDF files hosted on suspicious domains, all related to game hacks and cheats. The document body explicitly mentions 'Coin Master Free Spins Link No Verification Code' and includes the primary malicious URL, indicating a lure to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-link-no-verification-code-game-hack In PDF document text
    • http://samavetpharm.com/userfiles/files/100-robux_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/red-kine-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/hack-roblox-downla_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-alt-account-roblox_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/como-tener-hack-para-en-roblox_GM431946152.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
font_00_sfnt_off0000322d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322D 22428 bytes
SHA-256: 5993f4b086eb3ecc3f61e755a6a40f5605b7a54c87ebe6319f3a7847f00dcce8
font_01_sfnt_off000063db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DB 18652 bytes
SHA-256: bdc37e9fdb84c7f9bd1cdc58a73cd6cb90efc8d1c52484062942e7f2cec54e2f

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