Malicious PDF — malware analysis report

Static analysis result for SHA-256 677384d3f945371d…

MALICIOUS

PDF

43.2 KB Created: 2021-05-14 16:25:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 588eff785ad0cdd3a66db9d6c2f4f450 SHA-1: 675e319a873e7a4fc5f57e352d968fbc2a841fab SHA-256: 677384d3f945371d811c17d6020305d34454eb8cfc8df3717cfd8257687cade6
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 0.9969

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/how-to-get-free-spins-and-coins-on-coin-master-game-hack PDF link annotation
    • https://farkas.de/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/coin-master_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/google-moon-active_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://farkas.de/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://farkas.de/images/how-to-get-free-roebucks-without-verification_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_off000047bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47BF 27928 bytes
SHA-256: f53d8fafacad9c3bd91c93abb86e92eb0dbc12e1d15c43754fe3456f8e378ecc
font_01_sfnt_off000086e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E7 18224 bytes
SHA-256: c3eeb8e5bbecb0a66d0dccf890560b2772aaf25cfcf2943a976e8e45774626aa

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