Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c357f3073e457a9…

MALICIOUS

PDF

37.7 KB Created: 2021-06-27 02:10:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6f43c59d7ab007c1c70bd823b8f99531 SHA-1: 5a0e386c8f7687fe36dbc06e9bf1a0433a547792 SHA-256: 0c357f3073e457a9f81145324590658badd5d8e849e63634eb864433ec8841a1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free items' to entice users. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links indicates a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a social engineering attack.

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/how-to-hack-roblox-with-proxy-game-hack In PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/free-items-roblox-meepcity_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/free-roblox-western-outfit_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/free-russian-clothes-roblox_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/pubg-500-uc-price_GM1330123889.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/roblox-secret-cheat-codes-for-music-its-raining-tacos_GM431946152.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://aphb.or.id/new/public/ckfinder/userfiles/files/help-roblox-hack_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_off00003822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3822 23264 bytes
SHA-256: 349e7a4cea485aa2873f4c01aa517d10700b0663596951084f53259a8dcf72a7
font_01_sfnt_off00006ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA6 19740 bytes
SHA-256: 4a164743dab29ea9d3ddcb79362b9deeb001ba30a927d42b17edffcf40b5d1c1

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