Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f03a2f52c1ab40…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 05:33:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7749d97f861558d7292afdc921faae41 SHA-1: a525f7a53d78a632bd7fb6a79b083f74b619bf72 SHA-256: 53f03a2f52c1ab4014225b5e24d2a6908da74c7fd98916275313a250beb19b8d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free currency' for popular games like Roblox. The primary lure URL, http://netcdn.co/app/431946152/roblox-rpg-world-hack-script-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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-rpg-world-hack-script-game-hack In PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/roblox-howt-to-get-free-hats-on-rolbox-high-school_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/minecraft-esp_GM479516143.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-code-for-huge-cat-pet-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/3-roblox-games-that-promise-free-robux_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/robux-hack-2021-november_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-tips_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/how-to-get-free-robux-from-people_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/pokemon-go-free-kanto-event_GM1094591345.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-anime-roblox_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-roblox-executer-purple-bunny_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/kachifpro_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/youtube-free-robux-codes-urban420_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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_off00002ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF9 21972 bytes
SHA-256: f022b298f20f2c792bf5ff55380112b5bf74adf5efdb4cfd8396a71392ba2a4b
font_01_sfnt_off0000606d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606D 19428 bytes
SHA-256: ff356309cb386836989b4d30c64f1cef075f6a7770661ddbc4d07b8f57630a3d

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