Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d54e7a31befde4…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 05:04:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cb69e9a4d8526f62cf6f4346e8d06e8c SHA-1: 17b5006d9ab3f70a2e8bb84ce5b3cf0750962b4d SHA-256: 13d54e7a31befde4315e82ff02e91f1d1e0f001e7a9dea16ca7a49c4e517311b
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to external sites, masquerading as generators for game currency or hacks. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or phishing pages. The document's structure and content strongly suggest a phishing or scam attempt, leveraging SEO link farms to distribute malicious URLs.

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/406889139/how-to-get-100-free-spins-on-coin-master-game-hack In PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-robux-no-download-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-robux-2021-new-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/how-to-get-free-robux-no-buying-apps_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/cheat-pour-la-money-dans-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/roblox-roman-belgica-youtube-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/roblox-free-vest-png_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/roblox-free-roam-games_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/robux-hack-sin-descargar-nada_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/games-to-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-gift-cards-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/veil-free-download-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/roblox-bubblegum-simulator-cheats_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/hacks-for-pet-ranch-roblox-for-free-coins_GM431946152.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_off000031ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AC 22408 bytes
SHA-256: 715ad10a8954a797b796f8711ad0bdd6eaecac8dae2f2041fecb8da4f4ee6dd5
font_01_sfnt_off00006361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6361 18616 bytes
SHA-256: 75e6ca0d846814030aeb8d238a6779e7a1e1c8622c374b69a8320c66161e23d2

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