Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db249179ea33445…

MALICIOUS

PDF

43.4 KB Created: 2021-05-15 09:05:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: fe4a3327d5f422ce7c7d85e298f9e81f SHA-1: bab2064254236f29d17161e472502571c0911060 SHA-256: 8db249179ea334452aa6d183fb7aee839fec57c6ad0da7fa7ef2ca59d4ed9934
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on a domain known for malicious redirectors. The document body and heuristics indicate a lure related to game hacks and free items, aiming to trick users into visiting these sites. The presence of multiple redirector links suggests an attempt to funnel users towards potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.simplenepaltravel.com/userfiles/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-comcom_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-roblox-outfits_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
stream_003_off000048c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C3 27924 bytes
SHA-256: 1ed387bfa1de5bf42e0ea5489cba7a89f1aba2b14746c61c9a5549fa4b302407
font_01_sfnt_off00008853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8853 17968 bytes
SHA-256: a7d3fffb70a4648b1058189e3765bccd454023bd20bb72441abfe005f4b328a8

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