Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6a82e11694a1b4…

MALICIOUS

PDF

36.2 KB Created: 2021-07-08 10:34:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 43db3d59be7d5f2d83d2a9bff3add9cd SHA-1: df7fb64ff9b931ae5b21272093d721fdd4386a53 SHA-256: 5a6a82e11694a1b4a04fc1ade90853f18ee15383f83f397a3130c1a403a75b81
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of game hacks and free currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts numerous other PDFs, likely containing further malicious content or redirects. The ML classifier strongly indicated maliciousness, and the presence of multiple links to suspicious domains supports a high confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

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/406889139/coin-master-fun-hack-game-hack In PDF document text
    • https://www.ma-plast.hr/files/how-to-escape-prison-life-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-the-pizzeria-rp-remastered-fazcoins-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/access-flamethrower-for-free-roblox-car-crushers-2_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/roblox-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-person_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/play-roblox-for-free-without-signing-in_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-4ll-cool-hack_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/rbxcash-robux-free_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-how-to-get-free-clothes_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAC 22112 bytes
SHA-256: 4c9d138887320d3385ed55edad0ef1c81d20c98528bc12b74760abe7f9397c51
font_01_sfnt_off000060cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CD 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB2 18308 bytes
SHA-256: ec1c450ed3203d9d96c34464c72d7866981f6f15754b5123fb1f2af95b3a0b29

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