Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f9ae2ea14d1e0e…

MALICIOUS

PDF

35.6 KB Created: 2021-07-10 01:47:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 018bddc59024055848cefb90808f8d6c SHA-1: 01c87ca6c7f033ede03af1089e023408582c0b41 SHA-256: 49f9ae2ea14d1e0e24586b9690fa5710cc3586bbd2a1d04e77ce831612c31c43
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.tw/app/479516143/how-to-hack-minecraft-pe-game-hack PDF link annotation
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/robux-hacks-pastebin_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/roblox-yin-vs-yang-ninjutsu-hack_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/how-to-hack-sword-fight-on-the-heights-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/can-you-earn-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/youtube-robux-pastebin-hack_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/free-robux-with-credit-card_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/mad-city-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-using-money_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/cool-roblox-shirts-for-free_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/how-to-change-roblox-username-for-free_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
font_00_sfnt_off000035eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35EB 22432 bytes
SHA-256: ed5489ee5d7781c8efaeaf4c770ba209b2d3d6df7634f6377bdba5913c428f18
font_01_sfnt_off000067f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F0 18488 bytes
SHA-256: 219457e29f33dfec07786a29e70830a20555f796e9e6bb3f533c171663b580ef

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