Malicious PDF — malware analysis report

Static analysis result for SHA-256 53b1c1d0df49f664…

MALICIOUS

PDF

35.9 KB Created: 2021-07-03 19:23:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8c4ab97cd8c2aedc4d9d25778c312818 SHA-1: ec7b273ebb0ed6bfcf72929cf83842140e36d673 SHA-256: 53b1c1d0df49f664ad6f5979a9b2d7c629d0550f8be27d18c7a3ac27ef745c89
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-robux-generator-without-verification-game-hack PDF link annotation
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/hack-dragon-ball-online-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/como-conseguir-robux-gratis-sin-hacks-con-dos-links_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/server-sided-cheat-for-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-robux-only-half-to-use-username_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-robux-no-anti-spam_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/cool-free-roblox-outfit-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-girl-account-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/descargar-roblox-hackeado-para-pc-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/hack-para-tener-robux-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/can-you-get-a-warn-for-hacking-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-with-python_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/hacks-for-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/how-to-hack-all-the-cargo-crates-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/how-to-speed-hack-on-roblox-sword-fighting-tournament-39_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/hack-explosin-roblox-pizza-place_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_off000033b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B1 22660 bytes
SHA-256: 114d570862b12e81a57feb23f6f771c170a3134ed903c4b658294203a25f7ef5
font_01_sfnt_off0000666f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x666F 19436 bytes
SHA-256: d0e926b628c6de032872dc004c24afa0bd818e7bb7e50361af68be366a642f01

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