Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fbe7e1ad2c7b3d…

MALICIOUS

PDF

42.3 KB Created: 2021-05-23 14:22:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 80d2d804fb41f5bbf8270281fe99c80d SHA-1: a049fa49aab73a7cffecdfd5db780670655d6f32 SHA-256: 72fbe7e1ad2c7b3d6cc577ffab64107caa4b23fda276e78a2357b6457561de1b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically advertising 'free Robux' or 'game hacks'. The document body, though partially corrupted, also contains a URL related to a 'free Robux game hack'. These elements strongly suggest a lure-based attack, likely intended to lead users to phishing pages or download malicious content. No scripts were extracted, but the presence of multiple malicious links is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7490

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-do-u-get-free-robux-game-hack In PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • https://registrasi-transvision.com/ckfinder/userfiles/files/free-robux-hacks-no-verification_GM431946152.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_off000035ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35AE 28452 bytes
SHA-256: 1c26a4036daf9dbaff70b4cf16f1f0177a1427b9ff51b6c7e87c01d7b29c94bc
font_01_sfnt_off00007652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7652 3608 bytes
SHA-256: 608f0dd4f6bfb6adbccec84228618ee8e4c9e09226d7330efb5300e499d1567f
font_02_sfnt_off000082d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D9 18636 bytes
SHA-256: ab6f51fdb1eed883fd21dff3bd0336e3a1b816e6c21a8924207bfe84ed9a007e

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