Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f8c939cd206041c…

MALICIOUS

PDF

45.7 KB Created: 2021-05-13 15:05:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 33b4abeabed7ccba126e7e07d4317e1e SHA-1: 25e277bf98875126fcdd0b043ff6031452c70c71 SHA-256: 7f8c939cd206041c907f73d5313ddf1fae5d9d77212c04c9246e4210d411e1d1
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 0.9507

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/coin-master-free-spins-link-2021-april-game-hack PDF link annotation
    • https://sparkthis.org/ckfinder/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/free-robux-master_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B77 24928 bytes
SHA-256: 8bb3fb866535ecbae9254e6b790f3796c6a067e86f5b896baf2cb05636366732
font_01_sfnt_off00008428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8428 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00008f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2C 18532 bytes
SHA-256: 552a781c635be2f1783b3430facdc17a6d9e208cae7d98c52d6673c33e385b16

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