Malicious PDF — malware analysis report

Static analysis result for SHA-256 13bebbbdd0a42bf0…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 20:34:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0381ae1dafdd11e5c7bed4713717aac9 SHA-1: e27fa904c400f6de9fa78a2c99cf53366770d1ec SHA-256: 13bebbbdd0a42bf006d2cc425e874e577610bf80e7cca143d00d0428f2ba7e4f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and sites offering game hacks and free currency, indicative of a phishing or malware distribution lure. The presence of embedded URLs and a visual download button further supports this attack pattern. No scripts were extracted, but the document's content and heuristics strongly suggest a social engineering attempt to redirect users to potentially harmful content.

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.tw/app/431946152/robloxhacks-game-hack In PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/free-card-codes-roblox-2021_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/roblox-hackeado-con-robux_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/hack-dusk-roblox_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/how-to-get-a-free-face-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/free-roblox-sex_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/robux-maker-free_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/roblox-skin-free_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/how-to-hightspeed-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/free-robux-master_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/minecraft-hacked-client-bedrock_GM479516143.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_off00002ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF8 22596 bytes
SHA-256: 73bec30d8db8177faf0e5f75ed0a9926f638abbd091a72906d63c9764b9fdc66
font_01_sfnt_off0000617e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617E 18820 bytes
SHA-256: 2ccea82525463c59d3ef013baba30ec334edef503592fdffe768c3dcf14999d8

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