Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a0df1b656d7601…

MALICIOUS

PDF

35.8 KB Created: 2021-07-06 11:10:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 69266098c08aef8f4bf78869926cc214 SHA-1: 4c28d086757ff31bb17dc6ee07162c91848bb43b SHA-256: 60a0df1b656d76014fb21543923a6b996851b32b3247e1d258bd59956e89225f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which are SEO-optimized and point to sites offering free game currency or hacks for popular games like Roblox and Coin Master. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links suggests a link farm or phishing attempt designed to redirect users to potentially harmful websites. No scripts were extracted, but the document's structure and content indicate a lure for users to click malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/coin-master-daily-free-spin-and-coin-game-hack PDF link annotation
    • http://pustakasma.nurulfikri.sch.id/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/roblox-hack-robux-free-deutsch_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-get-free-robux-august_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-hack-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-summer-grl-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-online-roblox-no-download_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/roblox-infinite-money-hack-jailbreak_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-gamepass-script-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-zombie-roblox_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-roblox-codes-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/roblox-dragon-ball-rage-stats-hack_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_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_002_off000034db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34DB 22680 bytes
SHA-256: 9307ed7a6896838999f832a4b2306ec9b74919718d118bf592cbf401d6293296
font_01_sfnt_off000067b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B5 18772 bytes
SHA-256: a1dc96cae1db032b501f6986f060f4567329d4c170f8890bd2780cb4b8189df7

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