Malicious PDF — malware analysis report

Static analysis result for SHA-256 42ae44b08b5d5300…

MALICIOUS

PDF

42.0 KB Created: 2021-05-16 04:16:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b44d80bee89842bb2021f01dbc541e1b SHA-1: 54d6717fac52f8f721c1d744c1e356ab5c8c570f SHA-256: 42ae44b08b5d5300b351381cf82bdc0530203da0e914379f6560523c7aea6550
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized and appear to be part of a link farm designed to attract users searching for game hacks and cheats. The primary lure is 'free Robux' for Roblox, redirecting to a URL that likely hosts further malicious content or exploits. The ML classifier strongly indicated maliciousness, and the PDF structure itself suggests a malicious intent to redirect users to potentially harmful sites.

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/431946152/rbxcity-free-robux-game-hack PDF link annotation
    • http://ims-77.fr/images/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://ims-77.fr/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-cards-free-cards_GM406889139.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_off0000468d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x468D 25796 bytes
SHA-256: 438a864546a8c9795f08db8cf0478a3d47dabd0d87888eaffd8d1606e89c8059
font_01_sfnt_off00008142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8142 18420 bytes
SHA-256: f6fda3bfe323f9f0676c079c6b9141a3a072b0621584b37e36c0c9937e592518

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