Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca751aa87b5a8fd6…

MALICIOUS

PDF

35.0 KB Created: 2021-06-30 16:51:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0323bbc371e6fb6a248ba00680af39d1 SHA-1: 0f71dbfa2359b48ec17b48a64645483282fbda4b SHA-256: ca751aa87b5a8fd6106373635ccb5c819ca7a0828f00060293a203ca9c223bbf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-esp-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit vulnerabilities or trick users into downloading further malicious content, likely through a chain of redirects.

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.co/app/431946152/roblox-esp-hack-game-hack In PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-usernames-and-passwords-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/tiktok-free-hit_GM835599320.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/hacks-de-levantamiento-de-sables-de-roblox_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-robux-hack-no-human-verification-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/gamingwithkev-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coin-master-online_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/admin-commands-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-robux-no-survey-or-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/cheat-engine-roblox-fr_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/robloxs-how-to-get-free-tbc_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_off00003213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3213 22432 bytes
SHA-256: ad4fb0f6913366023447a6b0f485b78b956635bfee349acd490b7dd298eb72cf
font_01_sfnt_off00006421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6421 18832 bytes
SHA-256: 3b6a4348a88cf51a0592acb161e79cadc5e273e4a51752d6d244f4aee38fd76d

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