Malicious PDF — malware analysis report

Static analysis result for SHA-256 01259541dfeeda8b…

MALICIOUS

PDF

44.2 KB Created: 2021-05-13 17:43:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 495455ee13b7c9cd2d6ea83a91ec2c5a SHA-1: 9e9dcc089f004dd87e7f89f5bb2ce3e9e30ba095 SHA-256: 01259541dfeeda8b36041b18d09dd5597af97ecf005437abae4607f2d78f7695
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 0.9976

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 https://netcdn.xyz/app/479516143/how-to-download-minecraft-windows-10-edition-for-free-game-hack PDF link annotation
    • http://ferienwohnung-dorsten.com/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ferienwohnung-dorsten.com/images/free-robux-picture_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_off00004ea1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EA1 25668 bytes
SHA-256: b63dbb93f81892fccf72b874ee3ab0aff98e2df5a7e2e944d2ef1fec423702fc
font_01_sfnt_off000088da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88DA 18764 bytes
SHA-256: 21f431781c44949058772af5dafb642530c243ab7b82586e83b465fe58a13039

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