Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b41b06d822193d…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 21:29:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 99f8cae620cf156d51c2ecfcacf61f3b SHA-1: 53aa88b1ed39cb63a3676b22b1de50e00c809818 SHA-256: 49b41b06d822193d5538d5ec17947e5ae996a2d05859ee3b3845c126c5408469
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/406889139/master-free-spin-and-coin-link-game-hack PDF link annotation
    • https://elibrary.ikhac.ac.id/repository/roblox-robux-and-tix-hack-no-survey_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-gamepasses-on-roblox-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-free-builders-club-account-generator_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-clothes-roblox-mobile_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-infinite-robux-regular_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/1-https-wwwrobloxcom-games-202120211-mortusrpgfreevip_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/youtube-roblox-hacks-for-rubox-com_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-roblox-account-with-cookie-editor_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hacks-for-british-army-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hack-tool-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-lua-executor-free_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-play-as-guest-free-unblocked_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/secret-robux-hack-subscribe-to-make-it-works_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-slime-wings-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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
stream_002_off00003164.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3164 23224 bytes
SHA-256: 7c8854865a1ceb6b55e7cc5d38d4602266fa1c920497aae5a8d0e35460cc9d15
font_01_sfnt_off000065cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CB 18520 bytes
SHA-256: cf4ad3d0db45e011148417a5da2d48a735639744ac3d6c02cf0dfb2f3d5802a1

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