Malicious PDF — malware analysis report

Static analysis result for SHA-256 92872e59ef841add…

MALICIOUS

PDF

35.5 KB Created: 2021-07-02 08:20:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 95429857729a5fd5380e4546b2b2fce7 SHA-1: ee51a68a129c79baae71f01733e6500c302d742e SHA-256: 92872e59ef841add82491f6d625444d28823a689439bbc074d9523e67e859546
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to 'delta-roblox-hacks-game-hack', which redirects to a URL that appears to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a tactic to manipulate search engine results or redirect users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to drive traffic to external resources, likely for ad fraud or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/delta-roblox-hacks-game-hack PDF link annotation
    • http://www.elsire.co.in/uploaded_files/userfiles/files/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/como-hackear-assassin-en-roblox_GM431946152.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/www-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/2021-how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/roblox-how-to-be-copletely-white-character-free_GM431946152.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/roblox-free-gift-cards-list_GM431946152.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/roblox-arcane-adventures-v4-hack_GM431946152.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/roblox-tower-battles-credits-hack_GM431946152.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/ww-roblox-hack-top_GM431946152.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/how-to-cheat-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/pokemon-go-free-pokemon-generator_GM1094591345.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elsire.co.in/uploaded_files/userfiles/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E4 22980 bytes
SHA-256: 077b46b082d1c2484d77973935e759c9dbc063aa942cfb7cc0a550cf2b228802
font_01_sfnt_off000065d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D6 18928 bytes
SHA-256: 7784b1ab93d88b766b2b09a7e168d2ee4ba0c0182e7fd6138c66be777661afb5

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