Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7117757ae272506…

MALICIOUS

PDF

40.3 KB Created: 2021-05-13 19:00:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c4eaa0a6a78870a7ae48bcebb88e6372 SHA-1: bf39032f0d73dc1f35e2922842693c8c3dbbd7c4 SHA-256: c7117757ae272506a8c3de5634b925d28e7b18332bebf78c5e6d7fcc000b369c
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links pointing to a known malicious redirector infrastructure, specifically advertising a 'free Robux hack'. The document body and metadata confirm the lure is related to game hacks and generators, aiming to trick users into visiting the malicious URL. No scripts were extracted, but the presence of malicious links strongly suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0289

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/free-robux-hack-no-human-verification-or-survey-game-hack In 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_003_off0000343e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x343E 25340 bytes
SHA-256: 3fdce35bbe66c5f4b6d734cd43b0fe64263ee81267ca97829cacc45043981631
font_01_sfnt_off00006f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4B 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off000078f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78F9 19324 bytes
SHA-256: 661bab6f3a048473b92ec1de100f4f76f72057f0f8e039014173720ccd048479

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