Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b727b233732a6b…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 16:00:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1a567872351a559b5b297a7c0e950c67 SHA-1: 1c57a6d92edfe7ba0513ab4c94e1aba5e21424c0 SHA-256: c0b727b233732a6b0d1e08eaa2aa9bdda3373f54f2e8f2422b3e9c1d5bb74651
180 Risk Score

Malware Insights

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

This PDF document contains multiple links to malicious infrastructure, including a redirector and direct links to other malicious PDFs hosted on an IP address. The lures are related to game hacks and exploits, suggesting a social engineering tactic to trick users into downloading further malware. The presence of embedded URLs and the ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/479516143/can-you-get-minecraft-windows-10-for-free-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/any-free-roblox-exploits-2021_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/how-to-loop-jump-on-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/golden-chain-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/forts-update-the-northern-frontier-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hack-roman-aegyptus-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/best-roblox-hacks-2021-hand_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/are-there-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-free-items-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/cheat-codes-for-roblox-on-the-games_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-royale-high-cheats-for-diamonds-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/guess-the-drawing-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/reeze-tag-original-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hacks-for-roblox-rubux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-on-ipad-ios_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000322e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322E 22148 bytes
SHA-256: 8586b29607861b5e6dc283801e69d27bb389b6a4892871724d4ec1ea25147310
font_01_sfnt_off0000633b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 19116 bytes
SHA-256: e8039433bf59574774ab6d1b3300433467f64885375fcf650bf661ef17b6bd80

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