Malicious PDF — malware analysis report

Static analysis result for SHA-256 8049c2ae13ce48f9…

MALICIOUS

PDF

39.2 KB Created: 2021-05-10 16:01:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a9492654bf1767606c759aa97e99ee0b SHA-1: 5c96e4a41761ef1ca079cbe603c1de14cb23eda2 SHA-256: 8049c2ae13ce48f94200836b6b1d7c821d14f419247c6a09b7983c6cea9e0fc6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a critical redirector link associated with game hacks and free spins. The document body text and embedded URLs reinforce this lure, suggesting the primary goal is to drive traffic to potentially malicious or scam-related content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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-heaven-free-spins-game-hack In PDF document text
    • http://dobrovodie.ru/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-reward-link_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://dobrovodie.ru/images/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://dobrovodie.ru/images/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_003_off00003f3c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F3C 24684 bytes
SHA-256: 4e2b3d1d9d49fceaebede1b182f5ea6c63768d7e28b8e4c692f55a0d9ec9bc25
font_01_sfnt_off00007816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7816 18000 bytes
SHA-256: 6cee86ead4aeee921a3b6e14ddf6eb594f4a141ca364aa42231f8e25adb97f4a

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