Malicious PDF — malware analysis report

Static analysis result for SHA-256 107c4adce2392e4a…

MALICIOUS

PDF

32.9 KB Created: 2021-07-20 14:50:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 198923ba77948ba2cae0561038b387d4 SHA-1: 9e25adde5601ae1f8788b2dc51875a8bbdeb5025 SHA-256: 107c4adce2392e4af791e8bff1e579c339f832b1f396c267c6913e896dbfed4b
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 0.9900

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 http://netcdn.tw/app/431946152/how-to-get-robux-for-free-2021-game-hack PDF link annotation
    • https://jdclassicautoparts.com/image/data/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://jdclassicautoparts.com/image/data/files/minecraft-ps4-free_GM479516143.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_off0000297a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x297A 22744 bytes
SHA-256: 0660ccfa2291c39eb458d397b0cbcc12374506cfa039fdc058af2fca45e594d8
font_01_sfnt_off00005ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA7 18868 bytes
SHA-256: 5a8c8e86d5d4dd1cc9266912e870fa4b5beecfa6d543cb137e4a029f0406ff4b

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