Malicious PDF — malware analysis report

Static analysis result for SHA-256 614de26fe5d0616c…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 16:51:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c41603b89a388f5c89e8732cdffae116 SHA-1: 1c65d7aa74d9d89bb1903bc45d36e610a4c17e55 SHA-256: 614de26fe5d0616ce93f1101860667421a91b94083f7926e268a29c513a893dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically a site offering a 'robux generator' or 'game hack'. This lure is designed to trick users into visiting a potentially harmful site, likely to download further malware or engage in credential harvesting. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/robux-generator-com-game-hack In PDF document text
    • https://htdvn.com/public/upload/files/how-to-get-a-free-2021-roblox-account_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/dinosaur-simulator-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-lumber-tycoon-2-money-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-passtebin_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/invisible-hack-roblox-prison-life-withe-cheat-engine_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/all-free-offsale-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-robux-no-verification-no-offers_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-hack-clothes-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/how-to-use-no-clip-hacks-roblox-2021-novenmber_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/pokemon-go-free-qr-codes-2021_GM1094591345.pdfIn PDF document text
    • https://htdvn.com/public/upload/files/codes-how-to-get-free-robux_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_off00002fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC9 21696 bytes
SHA-256: 0e59a7c5d92d1dd7b7b82caa59952ad70383d11f6a8f6eef75bb2c54c935cf24
font_01_sfnt_off00005f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8E 18916 bytes
SHA-256: 088691c65f50ab09531f1c851a077ebe27b1f4f318b0f1904c67811985fc4ac6

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