Malicious PDF — malware analysis report

Static analysis result for SHA-256 988368e5e7c04fc4…

MALICIOUS

PDF

43.7 KB Created: 2021-05-14 21:02:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 21ca024aa917bf89d5d9c59495473176 SHA-1: e0590a31f6a316975284465f8fd573aadc974af6 SHA-256: 988368e5e7c04fc42b8565a657d75d5865610de5a7f1ad6e0c65c782563ce27d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a 'free generator / game hack'. The document body and metadata also reference this lure. The primary function appears to be directing users to malicious infrastructure, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0119

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-to-get-free-robux-promo-codes-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000351c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x351C 25572 bytes
SHA-256: 585c5f14e12ca444e475c3fc590b29f8dc30015a17b7e2a558c22b5f2639c0df
font_01_sfnt_off000070a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A3 2824 bytes
SHA-256: 45bf821f81e84f4aa8d8374f492b182b36404f38b462c7dc471deaad6ab5c104
font_02_sfnt_off00007a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4C 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000875d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875D 18872 bytes
SHA-256: 5ac59f2bbd716fa5a12c7062aef47b6358464a1e75e3d61e5fb3ce0da7ae841b

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