Malicious PDF — malware analysis report

Static analysis result for SHA-256 c46583a6afd675a0…

MALICIOUS

PDF

33.5 KB Created: 2021-07-01 18:09:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f41b1de9adedda1284a4624da8406581 SHA-1: abbb3adec7c5d487ee05db75e2a4fa2c9c45d367 SHA-256: c46583a6afd675a01839d06ec0429bec9afee07df4590d3b871b0ea106d23a29
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file 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 0.9980

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/free-items-roblox-pastebin-game-hack.
  • 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/free-items-roblox-pastebin-game-hack PDF link annotation
    • http://www.sovtigaz.ru/f/files/how-do-you-get-1-million-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/vehicle-simulator-roblox-cheat-scripts_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/hack-roblox-boku-no-roblox-remastered_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/deadly-sins-online-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/descargar-hack-en-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-hack-in-roblox-kozock_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-best-places-to-hack_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/hacks-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-slaying-simulator-hack-script_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/tiktok-free-4k_GM835599320.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-generator-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/aristois-minecraft-hack_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
font_00_sfnt_off00002c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C9E 21928 bytes
SHA-256: 45f2a10a9b86121050bd4127bb76a4a1534a143276bd3021f3aac4ef19f01a27
font_01_sfnt_off00005d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D23 19288 bytes
SHA-256: 44c7017ce80833ec2a6ef3b1d02a886bda0f5369a9dd6c512937a062f8b34cd5

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