Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d874099614db5fb…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 17:24:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f40111ee114e44ef41d97f6e44ccc903 SHA-1: e71e903d18e086d80e635fa0a3ae9f96dff6c870 SHA-256: 7d874099614db5fbec191ea8f48f18329167281c35d17005281336b615676dd0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a malicious redirector pointing to a "game hack" lure. The document body and extracted URLs suggest a social engineering attempt to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

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.tw/app/406889139/coin-master-rewards-game-hack In PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-get-free-robux-real-easy_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/robux-hacks-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/fly-hack-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/wurst-commands_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-robux-wiz_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-get-free-robux-by-pressing-g_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-model-roblox-broke-game_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-link-blogspot-april-2021_GM406889139.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_002_off00002fa4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FA4 22296 bytes
SHA-256: 085e476fa3d44bfe776dc49eb384917a5c7ab5bc9f5ea65f6a5949358b4b54d9
font_01_sfnt_off0000615e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615E 18172 bytes
SHA-256: 6cab49e6ca20ff1f1469f9296ad06f493139d97774cf5cd9dbace47665b9357a

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