Malicious PDF — malware analysis report

Static analysis result for SHA-256 75011605b67864cb…

MALICIOUS

PDF

40.7 KB Created: 2021-05-21 22:46:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d199af9a87bad80ca58064a1c22178b4 SHA-1: c4d812373fc8b7a0c17d0e73061e9f2c7e1fe366 SHA-256: 75011605b67864cbe8062107673f2c77b11868395ebb5d202689bea92f0e1f5b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that are flagged as malicious redirectors, specifically targeting users with lures related to game hacks and free currency. The document body, though partially corrupted, contains references to these lures and the malicious URL. The presence of embedded links and the nature of the lures strongly suggest an attempt to redirect users to potentially harmful content or download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7445

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-on-computer-game-hack In PDF document text
    • http://blueduna.com/images/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://blueduna.com/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://blueduna.com/images/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://blueduna.com/images/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://blueduna.com/images/how-to-get-free-robux_GM431946152.pdfIn 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_002_off000033d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33D4 25624 bytes
SHA-256: 0a4d7368e6e9b5a1e6d02bcb2cee7534ba1190a0b8df384f0d52aabdc553b05b
font_01_sfnt_off00006f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F32 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00007c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C43 18716 bytes
SHA-256: 2c87d7c74b7bcd7fade186f781764640e14dfaf637cd5e280742c056ede93ace

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