Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ab1ee002ee6082…

MALICIOUS

PDF

45.9 KB Created: 2021-06-03 07:17:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: c6757cce6e874ab891fcf54dac1346dc SHA-1: facc32d4c3c2a9388137a19edd0ff461346ce549 SHA-256: 44ab1ee002ee6082fc22a7a0ed652e16d99b5aa539d19f36251c7f40ca94ddfb
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be 'game hacks' or 'free generators'. The primary redirector URL, https://netcdn.online/app/479516143/minecraft-java-free-trial-game-hack, is flagged as malicious. The document also hosts a large number of external PDF links, suggesting a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the embedded URLs and the nature of the lures strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/479516143/minecraft-java-free-trial-game-hack In PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/wurst-commands_GM479516143.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-robux-no-email_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
stream_004_off00005774.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5774 26124 bytes
SHA-256: 576652abc0be8d1fc9a8b1a9d60f531ba5ad85c80698196c3c0f6326db1d405f
font_01_sfnt_off00009262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9262 17924 bytes
SHA-256: d296bfe87a6dc97e41f58611965175a9d8d851c6709ce0e2d245db43bc469752

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