Malicious PDF — malware analysis report

Static analysis result for SHA-256 23af4f68b67ea5ea…

MALICIOUS

PDF

40.6 KB Created: 2021-05-21 02:56:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 56ed39da36796ae8bb8083b079bb2769 SHA-1: 6f68a212eebf9080f0a8a80dca8336e249d94b99 SHA-256: 23af4f68b67ea5ea85944ba66ec2adb6569993802d06f5596cdbd4633a86ee99
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 0.7776

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/how-to-get-2021-robux-for-free-game-hack PDF link annotation
    • http://www.access-coiffure-tours.fr/images/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.access-coiffure-tours.fr/images/roblox-hack-client_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_002_off000035eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35EB 26064 bytes
SHA-256: 367f6e0598dedbe90078469caf417dd88312ee51164843eb203a30b8457f6c41
font_01_sfnt_off000071ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EF 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD9 18684 bytes
SHA-256: 6e9c0eecafd635f65838c8dbfb1e23e8457e4c9239d4b33e445d621fd980b18f

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