Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42816c791c55893…

MALICIOUS

PDF

69.9 KB Created: 2021-05-13 19:30:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d9a15ab343f22281a6ec71694987afc SHA-1: c8316de6ac10f6ca904e001b498887c89a3c6aa6 SHA-256: e42816c791c55893273724629649a2c611e72836208cb0240232f527681e6a68
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains embedded URLs, one of which is flagged as potentially malicious by ClamAV. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, suggests a lure related to a 'presentation folder template publisher', likely intended to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://xo-sound.ru/userfiles/file/92990441589.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1e2eb6760---66228670475.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/a9ad765552df263682d7fc9baa94f8dd/23805308577.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/1s5lq5u0aom2flt2mq3reicvmb/xudawunawanatawe.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/hf8qfcjo26sluf3vgq64h79p5i/95382832860.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e92dd3f95a---tajewuxunojixikevupupaf.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160774604adfd7---gubipopovinoz.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608091507c2b0---94528246222.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/58f1739a55bcfd46da40899c42c58e59/52605857892.pdf
    • http://humanitool.ru/userfiles/file/xifawadokinawamakupijekig.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/698f3e0cee8061c3ac3bf78cd6d79675/bavajanoborevewimixej.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086ad459c57d---mibedaboxigawog.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/8f62a5964bf45ca65e4b8a409c3a6508/deviwerukesukalitete.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/90c24590c1bdd7db4a7194cbc5f83fa5/59333668457.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/hl79lrv608gfk7utj1neud7511/medikuruvitubujuxajoxopo.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/981c637eedb1cd7c7422d7e2c0398520/jatejotaxefipomebe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=presentation+folder+template+publisher
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbcb.bin
2d1812fecad758346bc30e283be7d8f59586ea527b451f02dc62d7f9edf1c066		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 5424 bytes
font_01_sfnt_off0000ee04.bin
77c1ebbdcf003773ce0d6060231bbee9ca4e3bfcb04841505b70e870ab2923ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE04 10612 bytes

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