Malicious PDF — malware analysis report

Static analysis result for SHA-256 6032fb750a09838b…

MALICIOUS

PDF

34.0 KB Created: 2021-06-19 03:16:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c82d9cb0df2d58bd03127da349091cb5 SHA-1: 7b331f02d7bfa14c57ecb04fcc9e7c52ffb81cdc SHA-256: 6032fb750a09838bacd5b3c0b7249195839621a03383ae42b363db175459543b
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. It uses a LOLBin command-execution lure. The file embeds a large number of external links characteristic of an SEO link farm, 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 6

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/hack-roblox-chat-filter-cmd-game-hack PDF link annotation
    • https://hassel-event.de/images/how-do-you-get-free-robux_GM431946152.pdfIn macro / runtime command snippet
    • https://hassel-event.de/images/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • https://hassel-event.de/images/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • https://hassel-event.de/images/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://hassel-event.de/images/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • https://hassel-event.de/images/roblox-robux-hack-online-genorator-tool_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://hassel-event.de/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://hassel-event.de/images/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://hassel-event.de/images/how-to-hack-roblox-using-unity_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://hassel-event.de/images/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://hassel-event.de/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://hassel-event.de/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://hassel-event.de/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://netcdn.co/app/431946152/hack-roblox-chaPDF link annotation
    • 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
font_00_sfnt_off00002cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF8 22388 bytes
SHA-256: a6aeeb05fffa6b3139a5e1b64e431375a951a7e4f88d28626cdd9c0adc379290
font_01_sfnt_off00005ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE6 19456 bytes
SHA-256: 59a389406ce050b2e23e716062f4ab51a94033c172795f1b72dbb96a4ec2b362

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