Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eeea466a09ee707…

MALICIOUS

PDF

49.6 KB Created: 2021-06-09 06:42:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 30b0c0848bd325c68e1caa0359e2ad5c SHA-1: cd10a99cba26cfaaf59502ab0447493ebb2fa0df SHA-256: 0eeea466a09ee707ac394110b6cb671bb04c9d984efab90edc05bb880f36ee89
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9796

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/431946152/hacks-roblox-xonnek-game-hack PDF link annotation
    • http://perpus.i2s-learning.com//repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-in-roblox-2021-not-patched_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-roblox-clothes-boy_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_004_off0000500d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500D 26060 bytes
SHA-256: 51a27955b093e85c072dcddf2cdd811549c53bd6956403094191a447ceebbe92
font_01_sfnt_off00008d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D39 7436 bytes
SHA-256: 4a13d5d8cb047d0703728abd56fadd7857e02dd2d0bdc744bf23c6d558594edd
font_02_sfnt_off00009f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F3B 18184 bytes
SHA-256: 51406b89b7ee63f471babf500cc4c3f176d9b587a67b119b8fce39907b2acac1

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