Malicious PDF — malware analysis report

Static analysis result for SHA-256 55fa0fa490f6d12c…

MALICIOUS

PDF

53.1 KB Created: 2021-05-14 22:37:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 06db35c451f7bb1ad6a8ebdb902065e6 SHA-1: 3151b7f32c1006aeaa0687cf7ae1033dd00dcbb5 SHA-256: 55fa0fa490f6d12cdf715177b29b1330dc02d5648b398ecb15e0740ada6e0aef
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic firing for a 'free generator / game hack' lure, directing users to a suspicious URL. The document body, though partially garbled, also contains references to 'Free Robux' and the same URL, reinforcing the phishing pretext. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9231

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/431946152/free-robux-clothes-game-hack PDF link annotation
    • https://www.anagoria.com/images/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/free-robux-real_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://www.anagoria.com/images/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.anagoria.com/images/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • https://www.anagoria.com/images/coin-master-free-cards-link-2021-today_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_003_off00004f67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F67 37440 bytes
SHA-256: bc87947efecad11f8f873ddce56b6c911e6df486841e2fc6b526fcf76647c030
font_01_sfnt_off0000a377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA377 2880 bytes
SHA-256: 552e62132cae3603ce0819827e44d96a992bd06014cc5080bf3af4b2ea155b3e
font_02_sfnt_off0000ad50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD50 18360 bytes
SHA-256: a1d18e52fe431c3fa184e800cbb116f4a676a51d8f231eb3c7a40e64f11ea3a2

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