Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdecf29d61b4ae0…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 23:38:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1ade581ee72f838d7d3a37b06bfd2f0f SHA-1: 80540ab894d70a675b3bd73fb20aa177656606ef SHA-256: ebdecf29d61b4ae0eb7481d43cdbdeaa92a1346117578e327abb8481022ae6cf
220 Risk Score

Malware Insights

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

The PDF contains multiple links to malicious redirectors, masquerading as game hacks and generators, which is a common lure for phishing or malware distribution. The presence of a download button lure further supports a malicious intent to trick users into downloading potentially harmful content. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a malicious redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/431946152/comment-cheat-sur-stand-online-roblox-game-hack In PDF document text
    • http://libnh.stikesnh.ac.id/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-no-password-needed-and-no-offers_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/tiktok-free-100-followers_GM835599320.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005179.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5179 25508 bytes
SHA-256: fb6c4e5362180a4588032091800442d30369245b68087eb71338bec6fbc7b3f4
font_01_sfnt_off00008c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9E 2832 bytes
SHA-256: 78e89c8f621d90011ffb7a2107d701d4cdf090a2f2cf42d5a65297289afc8805
font_02_sfnt_off0000964e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x964E 18976 bytes
SHA-256: eafb7077130e9af5a492a01a9dcf0b32513951118b1735361b09939a78ca4d2e

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