Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a8703343682fd6a…

MALICIOUS

PDF

43.9 KB Created: 2021-05-12 07:23:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 3057ce217c4c4b5bcc5817f418daaff4 SHA-1: 0f793b7628244f06dcc8903afe122e3894b6afd3 SHA-256: 9a8703343682fd6ae509d4648a0ab506af507a18cf6db46e407f36f572d155cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector pointing to a 'game hack' lure. The document body, though partially garbled, contains text related to 'Coinmaster Twitter' and a URL that aligns with the malicious redirector finding. The presence of embedded links and the nature of the lure suggest a phishing or scam attempt designed to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/coinmaster-twitter-game-hack In PDF document text
    • https://www.europap.cz/images/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • https://www.europap.cz/images/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.europap.cz/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.europap.cz/images/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.europap.cz/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://www.europap.cz/images/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://www.europap.cz/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.europap.cz/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.europap.cz/images/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • https://www.europap.cz/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.europap.cz/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.europap.cz/images/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://www.europap.cz/images/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://www.europap.cz/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://www.europap.cz/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.europap.cz/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.europap.cz/images/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • https://www.europap.cz/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://www.europap.cz/images/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • https://www.europap.cz/images/roblox-hacking-website_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_003_off00004850.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4850 24384 bytes
SHA-256: 97de4c58021e522a257149d6d9e6b3e073ec2e724cc8ae6c48fb1c65787f3a8d
font_01_sfnt_off00007f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F97 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off000089b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B0 17968 bytes
SHA-256: a7d3fffb70a4648b1058189e3765bccd454023bd20bb72441abfe005f4b328a8

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