Malicious PDF — malware analysis report

Static analysis result for SHA-256 615ae83d8c993075…

MALICIOUS

PDF

34.6 KB Created: 2021-07-07 04:55:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: baa70a74a19ee05c43261615221057b1 SHA-1: 02fc51205c385abc7e98c4d21b209c1671db2ec6 SHA-256: 615ae83d8c993075e72db33f40b5aeb9de85b84c5c74e344b113e133fb09ae30
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on domains associated with link farms and SEO manipulation. The primary lure appears to be 'free game hacks' and 'free currency' for popular games like Coin Master and Roblox. The document body and embedded links strongly suggest a phishing or scamming attempt designed to redirect users to potentially malicious sites or trick them into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-spins-coin-master-daily-game-hack PDF link annotation
    • https://miraller.com/upload/files/how-to-get-free-robux-on-phone-without-human-verification_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-get-free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-robux-get-game-resources_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/get-1b-robux-free-no-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/muscle-simulator-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/real-roblox-hack_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/free-robux-without-human-verification-mobile_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-fly-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/elemental-battlegrounds-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-get-2021-robux-for-free-2021_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_002_off0000304b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x304B 22880 bytes
SHA-256: 922747d31cd1d736d037697ecd61035146c63775a7197d9d35cb021d53c81073
font_01_sfnt_off000063b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B8 18596 bytes
SHA-256: 5411b9dbca58f16f8af8c21ebe49ba809f0efece3103b9aa7bb9d97b6685b20b

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