Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d137d75a5e3066a…

MALICIOUS

PDF

32.1 KB Created: 2021-07-05 15:19:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a2488214bf9f0b5b969d3fc261b5e20f SHA-1: 94e844bf74e44aa075ce46a2e0108961e732a979 SHA-256: 1d137d75a5e3066a188770a34b064149b7c8c7629382abcb357b520be764e91c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, including one pointing to a 'free generator / game hack' redirector. The document body and heuristics indicate a lure to download or access potentially malicious content related to games like Minecraft and Roblox. The presence of multiple links to redirector infrastructure suggests a phishing or scam attempt designed to lead users to malicious sites.

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.tw/app/479516143/minecraft-client-game-hack In PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-hack-someones-robloc-account-for-robux_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/roblox-promo-codes-free-items_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/pubg-4-uccom_GM1330123889.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/can-you-earn-robux-for-free-anymore_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CD3 21544 bytes
SHA-256: 7cfd00ac6b5b1944f326b7ac21bd4789a91d4ea77ffbb7a1ef4d52a92638d1f8
font_01_sfnt_off00005bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF0 17928 bytes
SHA-256: 57e76fad508f079f9043ac60b045ca945e272a559816a83973d2a5b91d0e9761

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