Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d624487c29a46f0…

MALICIOUS

PDF

39.9 KB Created: 2021-05-11 21:00:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ca1e27d9a17180346a18c131c12446a8 SHA-1: 89de0ff69941c447d94b384b27d9ab8ca19ad4e8 SHA-256: 3d624487c29a46f0ba463094534712af338c96f8b1e62da150a3000bf1be70a0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that are flagged as malicious redirectors, specifically pointing to a lure for "Instantrobux" and "Roblox Generator". The document body also contains the phrase 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the social engineering aspect. The presence of these malicious links and the lure suggest an attempt to direct the user to a site that likely hosts further malicious content or attempts to phish for credentials.

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/431946152/instantrobux-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_off00003257.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3257 27172 bytes
SHA-256: 82d699e5963bcac607d588e8ac0851a35ad4554662ac850764fbf4e6b6fc994f
font_01_sfnt_off000070af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70AF 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00007a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5E 18184 bytes
SHA-256: 4d77632c85c001e266779ad9698d54220e11b78bd17d8b0f085f3dc4dd17180b

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