Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e50d04d083c2255…

MALICIOUS

PDF

40.6 KB Created: 2021-05-20 18:37:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2244ed7b52557a60ffb4bd400a9224fa SHA-1: bcf1bcb96222d7ce6876194ad7e89779d45358a1 SHA-256: 1e50d04d083c22559020ed607e825c03394cf07b1b9e1f9b2fe84c7ec875d333
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure associated with game hack lures. The document body and embedded links suggest a social engineering attempt to trick users into visiting these sites, likely to download further malware or engage in scams. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7499

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/406889139/coin-master-free-spins-link-no-verification-2021-game-hack In PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-robux-com-roblox_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_off00003569.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3569 25256 bytes
SHA-256: 820050ff4ce5b3a72200f9d2827224c1275f7dfdab1fa63a1e3b31f6d3b45ae6
font_01_sfnt_off00006fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE8 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off00007c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6D 18592 bytes
SHA-256: f74899e085c91cd53f5ca09b8a5278408f496fc0c0b246b6d10c1aa0f6296d24

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