Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea1b19775c3dbcb1…

MALICIOUS

PDF

48.8 KB Created: 2021-06-03 04:04:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0afceef403144092f8fdb4586de24bd3 SHA-1: 9331e649f4b1a4cc05ceb85d68775b85776f6461 SHA-256: ea1b19775c3dbcb1527efbf10275c03a107e595d49b65c05ae850b18b8dd7a63
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a malicious URL, disguised as a 'free generator / game hack'. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

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-ad-game-hack In PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/pokemon-go-free-99_GM1094591345.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/how-to-make-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/best-minecraft-hacked-client-2021_GM479516143.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_off000052e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52E5 25972 bytes
SHA-256: c75dbac62fdde7b200d904ed9c4fcb4b4060b7be7c1c004379ff6aea237e7dee
font_01_sfnt_off00008f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F67 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C79 18188 bytes
SHA-256: 8548f8eac6602b4da1df91b5e613954ee993c39611fc0c0834e4b9af2cb2062a

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