Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c002f3d77d82a1…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 17:22:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 24a55590eac3b339a131746213306561 SHA-1: 3ae4c0e5dbc2cb91594fa801f9f8ee387fe198e3 SHA-256: 57c002f3d77d82a106d28e74eb6d90ba63210622fb13df5e07f9d56e4bde9f2a
142 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on vierabyragazze.com and promise free game hacks and in-game currency for popular games like Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this deceptive tactic. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to phishing sites or download further malicious content.

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.co/app/431946152/roblox-promo-codes-2021-free-game-hack PDF link annotation
    • https://vierabyragazze.com/upload/files/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-free-robux-for-android_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-scar-h-free-in-phantom-forces-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/hack-treasure-hunt-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-rap-hack_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-spin-and-trading_GM406889139.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
font_00_sfnt_off00002ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF1 21976 bytes
SHA-256: 4be57d0bcc985d8f3176f262fa5429d0631db9b43561545ce6020339b65928f7
font_01_sfnt_off00005f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9F 19640 bytes
SHA-256: 97a5fc7c369cc633e016cc1c2bf40e8d13f6506e45b71d87799e0ee20b496127

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