Malicious PDF — malware analysis report

Static analysis result for SHA-256 c128692c5ae3ca94…

MALICIOUS

PDF

44.3 KB Created: 2021-05-10 20:07:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bc8abde34ccc11d309a0383c13963ecd SHA-1: 6495c42878c2a4020b6c55b2a92d228b04089c55 SHA-256: c128692c5ae3ca945c0896d9cd11df5c3fc926cba450a847f1801954058798f0
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with a primary focus on luring users to download game hacks for titles like Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. The document body and extracted URLs reinforce the theme of providing 'free generators' or 'hacks', which is a common social engineering tactic to trick users into visiting malicious sites or downloading malware. No scripts were extracted, but the presence of numerous malicious links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 4

  • 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/406889139/descargar-coin-master-hackeado-game-hack PDF link annotation
    • https://www.bathshoponline.co.uk/uploads/files/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-hack-ios-2021_GM406889139.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_003_off00004911.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4911 24288 bytes
SHA-256: 9537b3203a6e2660d16e573429f3dae468133593360e757edf20abfb909fd11e
font_01_sfnt_off0000802d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x802D 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A17 18344 bytes
SHA-256: f36247ffb38554f38145ddbd5964f7161795fb102c5bcaad17a29f5e2fd4ae9a