Malicious PDF — malware analysis report

Static analysis result for SHA-256 0144ca9c13dab777…

MALICIOUS

PDF

55.4 KB Created: 2021-05-13 04:58:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: feb01e5f770325224c43404a0c1c73f1 SHA-1: 59ff4d238733ed522a9c5b3e99c1125b16f961e6 SHA-256: 0144ca9c13dab777c58b56e975dae95e99a7d754f17596bb2f2579b43a24a52e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body, though heavily obfuscated, contains references to the same URL and appears to be generated by wkhtmltopdf. The presence of multiple embedded URLs, many of which are also game-related, suggests a social engineering attempt to trick users into visiting malicious sites that likely host malware or phishing content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8531

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/static-moonactive-net-rewards-game-hack PDF link annotation
    • http://www.mosaikshop.at/images/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C2B 26268 bytes
SHA-256: 84e4c8f0a4491fb0c0bd0eeb99c75880badef992f87baba256c6a23a9dbc3ebe
font_01_sfnt_off000089d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D8 3192 bytes
SHA-256: 2fd5d459aed3710c9c4c82cf2996fa8c4aa469387e05cce3a70daf2fdb781166
font_02_sfnt_off0000950b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x950B 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000a830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA830 18000 bytes
SHA-256: 9966684b9b98ae9c159578c69a57ea9c5c22f2a0e556d50b45713339f77195c2
font_04_sfnt_off0000c992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC992 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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