Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06fe5f134896346…

MALICIOUS

PDF

42.4 KB Created: 2021-05-14 10:43:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cfe01880b7401777d34db8778d169e26 SHA-1: 2e2d062ed5501f57caf23f2490ca1859ac045b61 SHA-256: d06fe5f1348963461fdeaa9afd9838b64c37930e3cd273d523220b20aa415ee8
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 0.9971

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/406889139/blogspot-coin-master-free-spins-game-hack PDF link annotation
    • http://karldall.dk/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/free-robux-live_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/body-roblox_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://karldall.dk/images/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://karldall.dk/images/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://karldall.dk/images/can-you-give-me-free-robux_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_003_off00004a01.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A01 25000 bytes
SHA-256: e4686f941dff102dcf89285fccba7bbd9fead23ad93532883eb7959bfafe6ac6
font_01_sfnt_off000082c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82C7 18464 bytes
SHA-256: af5d8a2e7c6ce5c46c231007036c3c30da92f088fd5d2b237af1a5c438451922

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