Malicious PDF — malware analysis report

Static analysis result for SHA-256 a91a53ce97d5d1b5…

MALICIOUS

PDF

33.6 KB Created: 2021-07-01 23:32:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c2d00df2c368754913c6f3ad9b8aee69 SHA-1: a9b180271b0bb3a4b6ccea622e98ddadfa20a26f SHA-256: a91a53ce97d5d1b501eef4ddfbc50db6c62f8e5c6d9887c40e9e5588594d4641
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a known malicious redirector. The primary lure appears to be a 'Coin Master Hack Tool' which redirects to the URL http://netcdn.co/app/406889139/coin-master-hack-tool-v1-9-pc-game-hack. This suggests a social engineering tactic to trick users into visiting potentially harmful sites, likely for further malware delivery or phishing. No scripts were extracted from this sample.

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/406889139/coin-master-hack-tool-v1-9-pc-game-hack In PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/tiktok-free-textbooks_GM835599320.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.interiormurahjogja.com/ckfinder/userfiles/files/how-to-hack-coin-master-ios-jailbreak_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_off00002e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E14 22344 bytes
SHA-256: a0287e17b298574aa61ea6294f762359e391bc43a429439a8d8a2af23d4895ad
font_01_sfnt_off00005f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9D 18636 bytes
SHA-256: 05e372db28382383b8fb1d6d85d0770e1cf8f4ab3bf844e67e8d39ea3396f519

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