Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d12c5c2b6cde875…

MALICIOUS

PDF

45.1 KB Created: 2021-05-14 00:06:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d3b45fe07b699476eddbeae59d497fd9 SHA-1: 20077d79b9b934bda7b9c2e96ebad574982ba909 SHA-256: 0d12c5c2b6cde8754e3081c9a7e555e8fa198fe6ee20ab4af5a2f0ba148e5c9e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9621

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/how-to-coin-master-spin-hack-game-hack PDF link annotation
    • http://seniorenverband-brh-nds.de/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/coin-master-pet-food-free_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://seniorenverband-brh-nds.de/images/roblox-free-robux-generator_GM431946152.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_off00004b14.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B14 25092 bytes
SHA-256: 87d941a4bbdb29581e06cae7eb6a53a1c71481839909e2da28fcd52d90735be9
font_01_sfnt_off000084c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C6 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E77 18056 bytes
SHA-256: 1f393610466877c335b0a746c42865a4ba6131ecef9c5b985171e4d7c94c57d8

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