Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1d2281df741bf0…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 18:20:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a4f1dfbee2179e4835fbad8218ed0d96 SHA-1: 7414368ec578318709ceda4f8b8122d60d174489 SHA-256: 6a1d2281df741bf056aa24332d26a32e3c2bf40b1ae6076d476f6af766a9c037
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains multiple embedded URLs and a lure to download a file, strongly suggesting a malicious intent. Heuristics indicate social engineering tactics, specifically a 'ClickFix' lure and a clipboard command execution lure, which instruct the user to run commands directly. This indicates the document is designed to trick the user into executing a malicious payload, likely downloaded from one of the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.co/app/431946152/free-t-shirt-design-roblox-game-hack In PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/roblox-hacks-scythe-download_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/roblox-jump-hacks_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/cheat-code-for-roblox-theme-park_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/roblox-assassin-hacks-2021_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/free-doge-head-roblox_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/free-robux-no-genoater-or-surey_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/dungeon-quest-hack-using-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/how-to-get-robux-on-roblox-no-hacks_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/get-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://nhadatinfo.vn/upload/ckimage/files/hack-robux-2021-no-human-verification_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_off000031e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E0 22808 bytes
SHA-256: a99338c54da0269e429d99447ee21762b007ea044345e7194b3e8aa3875427d6
font_01_sfnt_off00006538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6538 19208 bytes
SHA-256: c94d0f0a002a7ae5e1115c0e3a8619880b5dca44fe21145e93cb424e8069a0d1

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