Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d34a59f4d8eea44…

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 15:29:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ac2ddb737bb19cedef0f778e4dae01b9 SHA-1: 10cb2d2cb34c3eb121985ae82244e937cadc6495 SHA-256: 5d34a59f4d8eea44d4b3d60bc595fc83a483991ccc25b7a595829d80d845f6ae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a malicious domain, masquerading as game hacks and generators. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-private-server-roblox-game-hack In PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-booga-booga-instant-kill-hack_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-tricks_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-for-today_GM406889139.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_off000054f3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54F3 27328 bytes
SHA-256: 2befa6e18e1749b7fb3196f32b1884dc8ecdf74656e74cd845aea9be66af630b
font_01_sfnt_off0000954a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x954A 18668 bytes
SHA-256: 0c1ebf4725aa76ec92a53ac4eb5ef555557a7fe73d781563fc2c7a2c487d54c6

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