Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec8b9f6b2dc12b4b…

MALICIOUS

PDF

39.7 KB Created: 2021-05-21 15:11:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2e211a5fa5855151931777e6d47c4dd4 SHA-1: 70900ef8bef2cd006c13bc28de685989f9ce1126 SHA-256: ec8b9f6b2dc12b4b5cf81f4438c3d01302ed3d6a57de853d7b5b21cb333f222f
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 currency or hacks. The embedded URL 'https://netcdn.xyz/app/431946152/how-to-get-free-robux-codes-game-hack' is directly associated with a game hack lure. The document body, though partially corrupted, also contains references to 'Free Robux Codes' and a similar URL, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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-codes-game-hack In PDF document text
    • http://brokermortgages.com/images/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://brokermortgages.com/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33D5 25792 bytes
SHA-256: 7fd0d1683df89d7ed44ed0df7e6b2edadde8c79a84476803534e674799741681
font_01_sfnt_off00006f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F58 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00007906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7906 18456 bytes
SHA-256: 647704a1f8ac96c456e26df3796ee2ada4959e42324ca69004a5f2968b1e2bf7

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