Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4e5a71fc79a776…

MALICIOUS

PDF

43.9 KB Created: 2021-05-17 10:31:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 49fd874b248f0e124e3db8a3739918f8 SHA-1: d3af5d79cd1934e0bdd8c381793739a5d96e8dc1 SHA-256: fa4e5a71fc79a7760e39b106deb8b1b8c976948a26227bb89eabed6cb9681888
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'game hacks' and 'Roblox accounts', directing users to a malicious URL. This URL is flagged as a known malicious redirector, indicating a phishing or scam attempt. The document body and embedded artifacts suggest a social engineering pretext to drive traffic to the malicious site.

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-hack-roblox-accounts-for-robux-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_off00003252.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3252 27376 bytes
SHA-256: 4cacf5d65363d10efb36d9729ba5ff8d24e31303a334e199e6eebdb9f18d9c83
font_01_sfnt_off0000715d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715D 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00007b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B67 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off00008878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8878 18756 bytes
SHA-256: 937dc084e295f5db9e9abf98e8d9ece9a75bef1f1a22520950dbcf80e1ec543e

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