Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0ca640d55addb3…

MALICIOUS

PDF

43.1 KB Created: 2021-05-10 22:10:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 37d82eb11e3292fb763979a13f289716 SHA-1: 2db83a146ae3941c1a7c7c083f492824d7cd28fb SHA-256: ea0ca640d55addb349c0d6243f72dd76a6931b14717b073ca9aef9bd9cbb415d
142 Risk Score

Malware Insights

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

The PDF contains numerous links, identified as a 'link farm' by heuristics, directing users to sites promising game hacks and free currency. The primary lure URL is https://netcdn.xyz/app/406889139/pig-master-free-coins-and-spins-game-hack. This suggests a social engineering tactic to drive traffic to potentially malicious or ad-heavy sites, masquerading as a helpful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/pig-master-free-coins-and-spins-game-hack PDF link annotation
    • http://www.duchidicastelluccio.it/images/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://www.duchidicastelluccio.it/images/coin-master-in-app-purchase-hack_GM406889139.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_003_off00004b3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B3A 25840 bytes
SHA-256: ae37eb28f0f33795ea1c4640854868ad4c477ec6e622c71e1a6547811b871dbf
font_01_sfnt_off00008566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8566 18504 bytes
SHA-256: 61a83f927df5edb9f478f7ef694b2c9e4338115fc73db665eb245c70cf9f9e5c

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