Malicious PDF — malware analysis report

Static analysis result for SHA-256 1723e7321cab3456…

MALICIOUS

PDF

33.9 KB Created: 2021-06-19 01:32:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 55e6b046cbc26aa1855bc1604bdec3d3 SHA-1: c4391a3d90793b5446039b67723ec6ebaf09fe41 SHA-256: 1723e7321cab34563deede6da8b86027ba937a7f2dcff29be2cf9c6536023549
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious domain, promising free game currency or hacks. The heuristic firings indicate that this is a malicious redirector lure, likely intended to trick users into visiting potentially harmful sites. While no scripts were extracted, the presence of malicious links and the lure content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/gg-robux-free-generator-game-hack In PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/pokemon-go-free-spoofing_GM1094591345.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/roblox-hack-no-survey-or-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/is-tiktok-free-to-install_GM835599320.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/get-robux-today_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-robux-without-hacking-2021_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/give-me-robux_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-free-online-unblocked_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-hack-a-game-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-hack-on-roblox-huawei-tablet_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_off00002ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE4 22184 bytes
SHA-256: 6a3fee08a7fe9830c9d0c6ef17211351f18d9c3470acb4ff319518e3826bdb8d
font_01_sfnt_off00005fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FED 18820 bytes
SHA-256: b3906e3d65d2362ad9aeb7f84e2bd324cd0a73a48a8f91dd15cd9c78938be587

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