Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5b3c943399bea2…

MALICIOUS

PDF

43.2 KB Created: 2021-05-14 17:10:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 355a53002755d4ab57a42bc085b218ff SHA-1: 87dc4dcd9551589d682ad0acfcb531d1174fd05d SHA-256: eb5b3c943399bea2b49c2677c53be9918feb0b1e25748bd08c51a7583fe2b01f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are SEO-optimized to appear as legitimate resources for game-related cheats and downloads. The primary URL, https://netcdn.xyz/app/431946152/free-robux-come-game-hack, suggests a lure for free Robux, a common tactic in phishing and malware distribution. The presence of a PDF link farm and ML classification strongly indicate malicious intent, likely to redirect users to sites hosting malware or engaging in scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • 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.
  • 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 https://netcdn.xyz/app/431946152/free-robux-come-game-hack
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/free-robux-generator-without-verification_GM431946152.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-links-2021_GM406889139.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/how-to-become-a-hacker-in-roblox_GM431946152.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/no-human-verification-coin-master-hack_GM406889139.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/free-spins-coin-master-without-survey_GM406889139.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/best-free-minecraft-hacked-client_GM479516143.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/how-to-get-free-hair-on-roblox-2021_GM431946152.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/minecraft-free-reddit_GM479516143.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/mcpe_GM479516143.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/how-to-get-free-golden-card-in-coin-master_GM406889139.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-pc-game-free-download_GM406889139.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download_GM406889139.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/free-robux-com-real_GM431946152.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/2021-free-coin-master-spins_GM406889139.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-for-iphone_GM406889139.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/hack-the-game-coin-master_GM406889139.pdf
    • http://sfh.minurispenjaringan.sch.id/__statics/gudangsoal/files/hacks-for-minecraft-bedrock_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ef1.bin
382178e556984dfc5b3b5fba3618f755eea865fd3015cac102dd733ab793c99d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF1 24312 bytes
font_01_sfnt_off000086ac.bin
d7491fe45cc88596c87233a963b6162720bf27c142cea717df16fbc09fa29ea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86AC 18276 bytes

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