Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e8b79f3467a54a…

MALICIOUS

PDF

39.8 KB Created: 2021-05-22 06:09:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8eec87d9262ab7f2a5337b23b1b5cecb SHA-1: db31fc7b14c788457fb18ad7e1e77461e6f550b4 SHA-256: e2e8b79f3467a54ae05e8d2d6fe505161a5083476d26e45f06c6faab8b498f0a
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 0.8060

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/479516143/minecraft-windows-10-free-game-hack PDF link annotation
    • https://nexsoftech.com/upload/userfiles/files/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • https://nexsoftech.com/upload/userfiles/files/coin-master-hack-free-spins_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_002_off00003453.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3453 26660 bytes
SHA-256: daf5c8b3ba47e896e5c9cbf997d769f7beab2a40b21d6a3139faea1242b33090
font_01_sfnt_off00006fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCD 2820 bytes
SHA-256: 972979c3a46100cf5f8fd289bc6fbd2496ff75fec0e3f6753648c72ec6eba714
font_02_sfnt_off0000796c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796C 18524 bytes
SHA-256: 61f4e129dbb086a6f9797ef369c55cdd3b58d633037fca8f4f59eaf5785788a4

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