Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f55c6bc0652cfe…

MALICIOUS

PDF

42.4 KB Created: 2021-05-19 06:00:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0260a457898e017dcfde7e6e380cba2a SHA-1: 3210ba4ad14306721e36281aa39fc5d63dda32a3 SHA-256: b3f55c6bc0652cfe68a9145b8afcccee41bef24f483460c333cfe99367a1594f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to other PDF files hosted on subdomains related to free game items and hacks. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a link farm or redirection scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or social engineering attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/1094591345/pokemon-go-fest-free-tickets-game-hack
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-hack-generator_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/minecraft-free-download-mobile_GM479516143.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-email-rewards-link_GM406889139.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-without-offers_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-minecraft-client_GM479516143.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-no-fb-login_GM406889139.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-free-spin-ml_GM406889139.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-in-2021_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/easy-robux-hack_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-fast_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/how-to-change-your-name-in-roblox-for-free_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/games-that-can-be-hacked_GM431946152.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdf
    • http://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-generator_GM431946152.pdf
    • https://elearning.mtsn1bandung.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cca.bin
c79bc0d33b88cbd9e93935cdf72f2337f88d4ff382283f19512b77269e0401b0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CCA 24496 bytes
font_01_sfnt_off0000847f.bin
3cd60d7a27ed42e4336ccc7416b4d8d030849907fbe22b10e613a57a250e4235		 pdf-font-stream PDF embedded font (sfnt) at offset 0x847F 18068 bytes

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