Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cdb598a82e9e26b…

MALICIOUS

PDF

47.3 KB Created: 2021-05-17 04:10:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b8cf3041e29925de39fa26410c65ce38 SHA-1: 6488a2ba5c8cfc5b123ae38cfe841ea900331a5d SHA-256: 7cdb598a82e9e26b99013e745856e7ae7236cf97b9b9bc3173d5b5f0adc9ca13
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links to external PDF files, many of which appear to be SEO-optimized lures for game-related cheats or free currency. The presence of a download button and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/479516143/how-to-download-wurst-game-hack
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spins_GM406889139.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey_GM431946152.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/you-promised-my-son-free-robux_GM431946152.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/roblox-fly-hack_GM431946152.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/free-robux-codes-no-human-verification_GM431946152.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/levvvel-coin-master_GM406889139.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/how-to-get-free-pet-food-in-coin-master_GM406889139.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/claim-coin-master-free-spins_GM406889139.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/hack-avatar_GM431946152.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/play-games-for-robux_GM431946152.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/hack-coin-master-ios-download_GM406889139.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-spin_GM406889139.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/coin-master-golden-cards-hack_GM406889139.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/robux-scam_GM431946152.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/www-roblox-robux_GM431946152.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/coin-master-free-spins-iphone-2021_GM406889139.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/free-minecraft-maps_GM479516143.pdf
    • https://min2mojokerto.sch.id/__statics/gudangsoal/files/coin-master-in-app-purchase-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b8d.bin
431814a1f47b4bfc51669f3f683ebd51aa55ef4dc912d62d10a769e3a422f285		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B8D 29460 bytes
font_01_sfnt_off00008b9f.bin
c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9F 2892 bytes
font_02_sfnt_off00009588.bin
7549c5ff242de623ced2015b0eb416b949beaaafe418d998374bf37911f2b306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9588 18508 bytes

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