Malicious PDF — malware analysis report

Static analysis result for SHA-256 709a4cbe1c657d08…

MALICIOUS

PDF

42.5 KB Created: 2021-05-11 02:05:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: ce47f6fc74b259a567f0df1386d5599d SHA-1: 58ce95ded6a45e47020b0b4e73f6c897bb12f8f4 SHA-256: 709a4cbe1c657d0801aa240cdf8ef08771db06735449167231aa86aab69195cc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of game hacks and free currency. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful websites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-hack-roblox-accounts-game-hack In PDF document text
    • https://europainstitut.hu/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/free-roblox-intros_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://europainstitut.hu/images/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://europainstitut.hu/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://europainstitut.hu/images/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://europainstitut.hu/images/minecraft-116-1-download_GM479516143.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
stream_003_off00004965.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4965 24928 bytes
SHA-256: 1e1c13a4fe0f900c7dfd454187ba2e0be026c7ce7f9c4d2b932c100a04083458
font_01_sfnt_off000082b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B0 18588 bytes
SHA-256: 7bfa318362f39458d7d6cfaed4b7fb6212c616d22e88bbb7e9e73b07c323fe95

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