Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c3907f20bfc1f7…

MALICIOUS

PDF

35.5 KB Created: 2021-06-20 13:04:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e08d60393e1ceb4d31eb3a16e63e5a68 SHA-1: dfebf034ac9a03dd377c178f1270b09acc33181a SHA-256: 68c3907f20bfc1f7ef38b2840291582916900ac1dfd8c0a206b0647c0b6b24c4
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on domains associated with SEO link farms and malicious redirectors. The document body and heuristics indicate a lure for 'free game hacks' and generators, a common tactic to trick users into downloading malware or visiting phishing sites. The primary malicious URL identified is http://netcdn.co/app/431946152/blood-t-shirt-roblox-free-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/blood-t-shirt-roblox-free-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/roblox-walking-through-wall-hacks_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-admin-commands-on-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-games_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-boxing-simulator-2-cheat_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-without-emails-passwords-and-ccontact-number_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-pants-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-make-a-free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-daily-free-spins-link-2021-today_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_off000031af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AF 23036 bytes
SHA-256: 4373b2f400d1a7c84125b4366811bf5e7ebd5ca53e04f0296a13b838d89fd72f
font_01_sfnt_off00006589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6589 19216 bytes
SHA-256: 895952d967ea28b71ee01ce418d44638b33db22190dce805dc2ccd8a689c60f5

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