Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04065912b36083b…

MALICIOUS

PDF

49.7 KB Created: 2021-06-04 01:33:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7ba4ecb3ff06c7a39fa84f504c69caa2 SHA-1: d790e73bd75c0ec09135385168ff6f19afac4029 SHA-256: c04065912b36083b6dd4e9edcf67035c76a85eef70994b662e766b91c23fdbeb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, using the promise of free Robux and game hacks to entice users to click on embedded links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document's content and the presence of multiple links to similar lure sites strongly indicate a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • 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.
  • 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/free-robux-with-no-verification-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-generator_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/no-robux_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/tiktok-free-online-unblocked_GM835599320.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-spins-coin-master-2021-hack_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_off000053b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53B7 26660 bytes
SHA-256: ac908adb2b9965d73e35cdbad7c367ee2258ad4547d6eb8dff436d38e1bedb81
font_01_sfnt_off000090e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90E8 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off00009d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D90 18964 bytes
SHA-256: 882e97bebd076dae688415b0184bb224dca7d5b64082a0b27c077a0c76cfc979

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