Malicious PDF — malware analysis report

Static analysis result for SHA-256 442ff115038c22fc…

MALICIOUS

PDF

37.6 KB Created: 2021-05-21 08:23:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 000521f6c03c31f8ae6ce891c99e7d40 SHA-1: 88366cdc67c5d557f6fe8813a6b355a05c410c67 SHA-256: 442ff115038c22fc408c446c20b503a7b1b1c6b0f4237890af3e96f3c58f3a05
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 0.7010

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/free-spins-for-coin-master-game-hack PDF link annotation
    • https://www.failtesolar.com/uploaded_files/userfiles/files/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000318f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x318F 24384 bytes
SHA-256: 9eff3a51479c9348ed735f06cbb38e53f960068c7d798af05d0ff7102c8b39ae
font_01_sfnt_off0000689b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x689B 2956 bytes
SHA-256: cc6ee08a5af07cdf809d5f718a6f4b581fc47059b13d069ac995502e41039ee4
font_02_sfnt_off000072be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72BE 17884 bytes
SHA-256: 7a686c540965cac69e1923dfbb6a78ce3f92ec60dbbf6836da21cbb58cd4d6cc

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