Malicious PDF — malware analysis report

Static analysis result for SHA-256 35a521d4665354e4…

MALICIOUS

PDF

34.5 KB Created: 2021-06-20 08:40:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 72d318cf38cb5ec14dfbc3f6c770f085 SHA-1: 77870e679d3f1d26963cd8e47dce15e1238c3a6a SHA-256: 35a521d4665354e4f3bffcad69c12f150287294908c8261ff36347071fa5ea46
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to lures for game hacks and free currency, with one URL pointing to a known malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting these sites, likely for further malware delivery or phishing. No scripts were extracted, but the overall pattern suggests a downloader or phishing lure.

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.co/app/431946152/roblox-las-vegas-money-hack-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-spins-2021_GM406889139.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/access-here-https-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/pubg-mobile-uc-2021_GM1330123889.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-free-gift_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-levitation-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-cool-free-skins_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-people-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/flame-gg-website-hack-not-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/assassin-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-make-anything-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-hack-game-launcher_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-games-that-you-can-play-online-for-free_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_off00002ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF2 22296 bytes
SHA-256: cd7ce53e9cdd59246534a07d3bf4c826fb01730e575a5d0e97fef4529250665e
font_01_sfnt_off00006153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6153 19164 bytes
SHA-256: 10c0e75bdf28722d2c67f7dcb7eb9d4bd47f15ac7ac7b2aba658cc070ac79cb8

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