Malicious PDF — malware analysis report

Static analysis result for SHA-256 147874113e58e8f1…

MALICIOUS

PDF

43.2 KB Created: 2021-05-20 00:01:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fc3b6c2e7654137abbdacaa08842067c SHA-1: 97c3261ef1bb9fbbb64f7fbfcf5e5c5049c6644b SHA-256: 147874113e58e8f1959a2d93fef5a1a9b19210f25a7fef5cb22ec39fd316e813
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple external links, identified as a 'link farm' and a 'game hack' lure, designed to redirect users to potentially malicious websites. The primary lure is for 'free Robux', a common tactic in phishing and scam campaigns. The document's structure and numerous outbound links suggest an attempt to manipulate search engine results or lead users to further malicious content.

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/431946152/how-to-get-free-robux-easy-2021-game-hack PDF link annotation
    • https://www.smartitbg.com/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/roblox-trolling_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://www.smartitbg.com/images/www-free-robux_GM431946152.pdfIn PDF document text
    • https://www.smartitbg.com/images/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.smartitbg.com/images/minecraft-bedrock-free-server-hosting_GM479516143.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_off000048ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48BA 26308 bytes
SHA-256: 00a643ed143c809e731852ab4d7c266dabac9e9569c178d6099c28971cc3827e
font_01_sfnt_off000083a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A9 19092 bytes
SHA-256: b4f5bd8c8985fe06cb8cafea7c6a35db41ab3230d9b691422e9309a9df735677

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