Malicious PDF — malware analysis report

Static analysis result for SHA-256 c489dc56ed91c228…

MALICIOUS

PDF

43.1 KB Created: 2021-05-11 13:03:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: eb91fefdd40956e285fb1af4416bd27b SHA-1: 1044718f114a3e13a989590722db91c568c653c3 SHA-256: c489dc56ed91c2285459cd04e6ba5cd9557d80e0d931d0dfb10c8a2eb6aa2d1c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector, masquerading as a game hack or giveaway. The document body, though partially corrupted, contains references to these lures and the primary malicious URL. The presence of multiple links to similar scam-like content suggests a phishing or scamming attempt designed to trick users into visiting malicious 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/431946152/roblox-free-play-game-hack In PDF document text
    • http://grupodin.com.br/images/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-app-for-free-spins_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_off000049bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49BB 25620 bytes
SHA-256: 74302b0de9e68a80cd4d2882e6e9fb8b5aee1dc04ca60bc9fd7d73ade747337d
font_01_sfnt_off0000854e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x854E 18512 bytes
SHA-256: eed476aa069bc09357c43ec056cace655c39995f669be6a5bb4491b7d3b62334

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