Malicious PDF — malware analysis report

Static analysis result for SHA-256 333597f31a62186a…

MALICIOUS

PDF

37.3 KB Created: 2021-06-28 12:49:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9d2870fd6bddf5a6b6c853cab149c909 SHA-1: af9b34fbccc99d448a2f26c0dfce509c26b39456 SHA-256: 333597f31a62186a3dc819deae16f5a905502efe6baee4726575eff1bbeb1a05
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. 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 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/robux-hack-tool-2021-game-hack PDF link annotation
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/free-robux-website-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/roblox-jeailbreak-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/free-fashion-frenzy-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/how-to-use-cheat-engine-in-roblox-after-patch_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/hacking-a-roblox-fans_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/free-robux-giveaway-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/pastebin-roblox-promo-code-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/how-to-get-any-roblox-item-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/hacking-as-a-guest-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/promo-codes-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/how-can-someone-hack-into-yourroblox-account-from-discord_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/free-military-costume-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/free-robux-instantly-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man4banjar.com/__statics/gudangsoal/files/roblox-account-stealing-hack-by-kingtennisbal-deutsch_GM431946152.pdfIn PDF document text
    • 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_off00003900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3900 23056 bytes
SHA-256: a986ec7c8d9d550f6c167707b057609db56c3acc6eb7bb44d152479d6d410771
font_01_sfnt_off00006c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8E 19200 bytes
SHA-256: f3d53328a3f9703cd6976224aa0c46fc15cc5a196dcc6f5200a1b54d3b36e2eb

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