Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d20bd4ff424df3…

MALICIOUS

PDF

45.8 KB Created: 2021-05-15 04:49:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bd8625c16d9c6ad14cf5373f4159e862 SHA-1: 23ed290fafde8e96ba2f47d3cc701649295dccfd SHA-256: 60d20bd4ff424df3da1a39a7801a7bbf47e7272d5fc33440ff040d597ff98d31
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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 https://netcdn.xyz/app/479516143/minecraft-fly-hack-game-hack PDF link annotation
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-prison-life-hack_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_003_off00004c3b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C3B 33864 bytes
SHA-256: 49215ed909e311d6a8697ec877b80122eec4dfd1f2f1c656f32d14bcb9ba635d
font_01_sfnt_off000091ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91EF 17992 bytes
SHA-256: 06651707645ad1f4ebda8b3f746ca430a0b9618d46277a77061ba05985c34688

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