Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc613b22ef3a9e25…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 06:21:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 42969da26be2a3107b76f42566c51ea1 SHA-1: 2dfbc4f3e6e72491598e4f8a2f7546441fc5793f SHA-256: cc613b22ef3a9e25bb5892db14754e3bfb61ff85febbbfa8c00dc7468c5276a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector leading to a 'free generator / game hack' lure. The document body explicitly mentions 'Free Robux Codes 2021 Mobile' and 'CLICK HERE TO ACCESS ROBUX GENERATOR', indicating a social engineering attempt to trick users into visiting potentially harmful sites. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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.co/app/431946152/free-robux-codes-2021-mobile-game-hack In PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-scr-hack_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-picture-verification_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/has-roblox-been-hacked-2021_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-roblox-redeem-card-for-free_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/tiktok-free-stuff_GM835599320.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/yt-comment-hack-roblox_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-free-spin-link-app_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
font_00_sfnt_off00002fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA4 22608 bytes
SHA-256: 05bad6ca9e2218d9fac2bfb6bf618656f542b2ec1a409a98731cdf066f7619bd
font_01_sfnt_off0000624c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624C 19680 bytes
SHA-256: 3562860e7cd2560506950fbec4144ad20867ddc20a9063786229262c711b95ab

Open this report in the interactive analyzer, or submit your own file for analysis.