Malicious PDF — malware analysis report

Static analysis result for SHA-256 15644f705b9f9fb7…

MALICIOUS

PDF

39.4 KB Created: 2021-05-22 01:38:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: acdebbf40f939339e8a15d71551d759e SHA-1: 6b4ddf4e1a406c80bf521fda02062849be1c7786 SHA-256: 15644f705b9f9fb7c3f671388d4741a470a9f84204038d9da45fcb99af417316
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically targeting users interested in game hacks and free currency. The document body and heuristics indicate a lure for 'free Robux' and 'game hacks', which ultimately directs users to malicious infrastructure. The presence of multiple PDF files hosted on d-loft.com.tr suggests a campaign distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/websites-to-get-free-robux-game-hack In PDF document text
    • http://d-loft.com.tr/images/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://d-loft.com.tr/images/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://d-loft.com.tr/images/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://d-loft.com.tr/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://d-loft.com.tr/images/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003182.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3182 31708 bytes
SHA-256: da08fd23c0689f2013637d654564a8b98ee2c54d902e5e69bfd19bca8b46177f
font_01_sfnt_off0000787c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x787C 18436 bytes
SHA-256: 6ab9ab31980840835fbaeca164a74f0e8188db39a6ce5c5e4face3e95ba0b523

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