Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bee27f3fdf01e19…

MALICIOUS

PDF

40.4 KB Created: 2021-05-11 16:32:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: eb5eeebaaa086d0ae0fcd7af5cffbd52 SHA-1: 394d491b17535472e4604ec9621bfd1294cc42de SHA-256: 5bee27f3fdf01e1977adaa37b1c96371f9eea97bed4fdca898e7d158a7177afb
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a website offering game hacks and free coins, a common lure for phishing or malware distribution. The heuristic PDF_GAME_HACK_REDIRECT_LURE specifically flags this behavior. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to drive users to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/406889139/master-8-ball-pool-free-coins-game-hack In 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_off000031c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31C0 29028 bytes
SHA-256: b3f2be5576d4be14835883f68998f6148d96e47e335d036ba5edc460c64ba3bd
font_01_sfnt_off00007288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7288 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C72 18364 bytes
SHA-256: 6e0a537e63e8d7ae493ffba7f694c0e5cbb50b5e44b8f04c82ad864b2eef269a

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