Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70629d1661be790…

MALICIOUS

PDF

35.3 KB Created: 2021-06-25 15:34:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c46f025014878cc3e1f72d5e77576d27 SHA-1: 6101e3b62541ac55df26d32240a9ffec88de877c SHA-256: d70629d1661be790e1d38c6981895d61a55d3bea9dfba36939de4fb90a2e3c41
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of game hacks and free currency generators to entice users to click on embedded links. The primary link, http://netcdn.co/app/431946152/jailbreak-roblox-hack-download-2021-game-hack, is identified as a malicious redirector. The document's structure and embedded URLs suggest an attempt to deliver a second-stage payload, likely a downloader or exploit, under the guise of providing cheats for popular games.

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/jailbreak-roblox-hack-download-2021-game-hack In PDF document text
    • https://knj.com.tw/image/data/files/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/cheat-roblox-jailbreak-2021-money_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/cipherv3-roblox-exploit-rocky-hacks-and-more_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/toolbox-apk_GM479516143.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/roblox-hub-free-robux_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/free-robux-easy_GM431946152.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_off00002f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F57 22732 bytes
SHA-256: 9617dd0dc375d5e3745c15463b577a5614f4cb06ee1179fce37b0bae60bf030e
font_01_sfnt_off0000624d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624D 19852 bytes
SHA-256: 1bce85ee50931418c93feb1a1cfcb7430c7900f9f35c4bb7a53c303447a34dc1

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