Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6662cb38859751…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 11:22:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5eddc3d9d8b8535d254d3202150d2662 SHA-1: dfae326450d37286d6808a477f4d3923274fd83c SHA-256: 5d6662cb3885975119f323d263a4cfcc7f8dca002cd58d690cd535f5174aaf99
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs and a primary external URL, all related to game cheats and in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users searching for game exploits. The ML classifier also strongly flagged this PDF as malicious. The presence of these links and the lure of free in-game items indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/earn-robux-by-watching-ads-game-hack PDF link annotation
    • https://katalog.smkn1glagah.sch.id/repository/roblox-ban_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/cheats-do-roblox-cs-go_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/earn-free-robux-videos_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-free-robux-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/which-are-the-best-free-level-7-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-250-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/codde-for-free-roblox-hats_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/simple-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/cheat-roblox-jailbreak-android_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/hack-de-roblox-robux-gratis_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/pastebin-hack-robux-gratis-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7B 22636 bytes
SHA-256: 37ec682e39d25f1f54bcc3f7b9c12936eaecbd53beb9c5d7c925500450300135
font_01_sfnt_off000060ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EC 19492 bytes
SHA-256: 6accebd3176df4525d0b6b61c4a2189885d974444c570743fb38c2e38d67c57f

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