Malicious PDF — malware analysis report

Static analysis result for SHA-256 20062c8e37e71f1c…

MALICIOUS

PDF

70.1 KB Created: 2021-05-13 10:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dae0f5ca21e58c7bedb74e47093c859f SHA-1: 2ebe1362144cad23b68adef4a6bcb4efe4fd5134 SHA-256: 20062c8e37e71f1c35cff304c1ed8b43182f900f149f83d959e65b1e9690aa5e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains embedded URLs, some of which point to other PDF files hosted on potentially compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily corrupted, suggests a lure related to educational worksheets.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab9a7914c---30117372310.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160980878ea959---3587029923.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/e649dc3711c233e11a7b8ec8c59f0574/59963858626.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608016b2305da---fogipewisopulutimewuz.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16097a69a7391f---33857703918.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/226700a8edc45b7b6e087184f28a881a/ludifoli.pdf
    • https://aronabritcan.com/userfiles/file/junuluguse.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/0e2065580074510f45ded1953a45e751/geriwifezakipagovawaj.pdf
    • http://emotionpicturesfestival.gr/userfiles/file/gafevoxevuxim.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/3fa6bb43e9b5be7f809ceaf6be8169c4/wasexijesobulufawagamef.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/h2bgo3gelof08spuqg2sfb2uf5/getosuginolex.pdf
    • https://deltagroup.bg/uploads/file/xajojesa.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f76c198f7---fuguworufepobexiwerilika.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=descriptive+adjectives+worksheets+for+grade+8
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2bc.bin
d99af0baec5e275e5488de43e6a4b55c3bb8e6a575cd3f9eab89a8097e7ede0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BC 5872 bytes
font_01_sfnt_off0000e6e0.bin
d34d468d27c62e1d5fa907f7733cf4b347b5001ad7f061fb1cbb4729c6167b12
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E0 10664 bytes