Malicious PDF — malware analysis report

Static analysis result for SHA-256 14565146c9cffabd…

MALICIOUS

PDF

79.2 KB Created: 2021-04-28 10:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03b7f9cedf031c307695e003d2bfe5e8 SHA-1: 781916b0fbb466be601a003bf9bb1eaad080f67c SHA-256: 14565146c9cffabdeeee921cf67a9a128a65592b8fa26fe712502ae79733ac7c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The presence of multiple embedded URLs, many pointing to PDF files hosted on compromised websites, suggests a phishing or malware distribution scheme. The document body is heavily obfuscated and contains metadata related to wkhtmltopdf, but no clear textual lure is discernible.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160764cb922cc2---karuno.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755170a7819---28591218941.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/tv2o7o2phredbr8en00o1s85th/4831583994.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/62db38908d83cbc85404e414659e1a58/gudagadig.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160750311b88b6---36982182198.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d283748bf---sijifurawegixasulitera.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/r5m56t26nndm17b05ql2vt3q6i/sijovukitagol.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607801f69e31a---jiniwirofeve.pdf
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/e373ecacc71c7d28052a5f611ca2ffee/7114299404.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/ed40ae582ce19ff6cb77be4ad16f9d6a/39185255570.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9b83e55cc---62908591864.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d28abe91f---53819340944.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/05fe44d326b9ae6fc1ae83ca1f418534/15075951164.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160819e66dea3e---43944150532.pdf
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607516219ccfb---dapurepikitunun.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087cd2431a37---74210232162.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607204ea579dc---vedizavirirawoba.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/59d89da75ac80b6dd98961067a0a01f0/23763708635.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=baal+veer+first+episode
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee2f.bin
949db0d603d227a5e0e634ebf47dfa4025a03e73af355149cd9b3c7d757cc9e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 4824 bytes
font_01_sfnt_off0000feaf.bin
0fa93a3febc3cd07f223233468965931552697d6fa2ff66c8f735f154f391f39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAF 10284 bytes
font_02_sfnt_off000121c4.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121C4 4324 bytes

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