Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3477d05e3da4ca…

MALICIOUS

PDF

35.9 KB Created: 2021-05-20 17:00:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2e5f159474775a395d2f28b990a056fe SHA-1: dc1ec0aeb3a80b603a6d428e718c1cffa71276ea SHA-256: 9b3477d05e3da4cadf9616967b6b9d61adbf6c431767f6e5b5678517c302c850
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game items. The primary link directs to 'netcdn.xyz', which is flagged as a malicious redirector. The document body also contains a call-to-action phrase, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/479516143/best-free-minecraft-texture-packs-game-hack In PDF document text
    • http://mbbs.hr/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-without-verification-2021_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
font_00_sfnt_off00003258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3258 24676 bytes
SHA-256: f414f1dbe70499626e722fc478595a92d433302caeccb5c2493b6fece7f0803b
font_01_sfnt_off00006aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAE 18460 bytes
SHA-256: 31257519935a968b1de16a3a71cb9b2eaae2afa87081bbe73112141ce1027594

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