Malicious PDF — malware analysis report

Static analysis result for SHA-256 1af6f42776e6d12e…

MALICIOUS

PDF

37.4 KB Created: 2021-05-23 07:36:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b434627fb31a3db7eb60672880222331 SHA-1: 2b7474e8ed450133641144d685fdb58ebaf8c995 SHA-256: 1af6f42776e6d12e0db6e9546a14ebcd7bfe5fd38bdc65430098b972fab96501
122 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. It uses a password-protected-archive lure. 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 0.9447

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/479516143/minecraft-java-free-trial-game-hack PDF link annotation
    • http://carmen-duran.com/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://carmen-duran.com/images/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://carmen-duran.com/images/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://carmen-duran.com/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://carmen-duran.com/images/static-moonactive_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_002_off0000372c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x372C 25852 bytes
SHA-256: 76d6d631aea7349d20efc0c34c347d1918e40d0d336d2634c6df98578292db44
font_01_sfnt_off0000722c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x722C 17924 bytes
SHA-256: d296bfe87a6dc97e41f58611965175a9d8d851c6709ce0e2d245db43bc469752

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