Malicious PDF — malware analysis report

Static analysis result for SHA-256 810900fe02d717d6…

MALICIOUS

PDF

34.1 KB Created: 2021-06-29 11:21:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4024caef07529ba330ea4a8487c109dd SHA-1: 6aa44cd1af8e12378a7805f1f51c920efa71311e SHA-256: 810900fe02d717d66c6f0fff1ce338346908b8e64efbdb7540109af411b062ae
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains numerous links to external sites, including a malicious redirector at http://netcdn.co/app/431946152/get-free-robux-copy-and-paste-game-hack, and a large number of SEO-optimized PDF links, suggesting a link farm or content-spamming operation. The presence of these links and the overall structure indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

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/get-free-robux-copy-and-paste-game-hack In PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/cheat-enging-for-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-online-free_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-one-punch-man-unleashed-hack_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-cheat-engine-scripts-2021_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-hack-blox-watch-on-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://ourlady-elearning.com/userfiles/files/coin-master-daily-free-spins-link-blogspot_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_off00002e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5A 21948 bytes
SHA-256: 1b03f579259a9e9fc943d410a183dfb2dc884b62653fcfdba5576bfa0602acc6
font_01_sfnt_off00005edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDC 19504 bytes
SHA-256: 24cbf3cc314ac46c6391b0da3cfcc0fe66f64f30525890fccb80eee05c0bb455

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