Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f04cc3955f3c98…

MALICIOUS

PDF

45.0 KB Created: 2021-05-16 17:14:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a1baeb2ea3716a09cd6baadc0c5ac6e4 SHA-1: 32fa449eb7e41e509d75aded00207bb302a9bfdd SHA-256: 89f04cc3955f3c980efcc9e2f007ab431856390300a04585a9f8b7bbbdc5057d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting "game hacks" and "free spins" lures. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-free-spins-no-human-verification-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector chain designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-no-human-verification-game-hack In PDF document text
    • http://modlingua.com/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/original-roblox_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-tiradas-gratis-link_GM406889139.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_003_off00004a87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A87 25164 bytes
SHA-256: 328a2efc24008d00393e7c892759e1287b18fc57b4ab7216f421e0513ec0a553
font_01_sfnt_off0000836d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836D 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1F 18420 bytes
SHA-256: bda9d64311803d8ca1e60170c3ec5fa1333a71d10f10bc88962b6478ba2902e6

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