Malicious PDF — malware analysis report

Static analysis result for SHA-256 0800a68b88baa14b…

MALICIOUS

PDF

75.3 KB Created: 2021-04-05 12:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5180ffea07970fce5c0ea074a8dead3b SHA-1: fc945a88cc5027601eacff7a13487afcc22deaa2 SHA-256: 0800a68b88baa14bc79d02c827ca6ff112473dbd4492d996d413e3965840ef73
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, one of which points to a PDF file hosted on a suspicious domain, likely serving as a secondary payload or lure. The document body, though heavily obfuscated, suggests a pretext related to employee development plans.

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://zexaribamemavi.sportsontheweb.net/fujapumemojukufuxer.pdf
    • https://cdn.sqhk.co/wavudasawete/7gggigg/elder_scrolls_online_buy_alchemy_ingredients.pdf
    • https://cdn.sqhk.co/xumobopore/i2gigie/56189256361.pdf
    • http://tacfitproducts.com/acrimony_free_movieb8ntf.pdf
    • http://kotudekudoges.getenjoyment.net/accidentes_de_transito_en_costa_rica.pdf
    • http://creditscorehelp.info/lg_hbs_910_pairing_modewywc7.pdf
    • http://kibesamifi.getenjoyment.net/manual_ortopedia_y_traumatologia.pdf
    • http://rollernefritmassage.xyz/edward_leedskalnin_book6pqo0.pdf
    • http://wamipivifubape.sportsontheweb.net/bsc_physical_science_computer_science_syllabus_du.pdf
    • http://healthyforczechrepublic.site/38542135253x1ksp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/vAIYpVcV8Aw/wb?keyword=individual%20development%20plan%20sample%20for%20employees
    • http://baxewape.myartsonline.com/15273290997.pdf
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_49a8c982306d4182ac85093d5e95be93.pdf?index=true
    • https://c38d9960-f3a4-46a0-b266-cfc7836dd0ed.filesusr.com/ugd/a8d9c8_a0e21d686ce7470da64b51153ce57878.pdf?index=true
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_bc573cde686a4400bf541765d59d3c1e.pdf?index=true
    • https://359ea524-acbf-40a7-8d58-ee96a8f10bc8.filesusr.com/ugd/ca2e76_9ddece7b800e4b5a881577f8fe0ac4bb.pdf?index=true
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_fae0f402b5f74b6e846a094b57e4ca41.pdf?index=true
    • http://bibezakomi.myartsonline.com/26363846095.pdf
    • https://cf587a47-7c2f-4f55-8bbb-21a4c73503f7.filesusr.com/ugd/8ea597_e79cc339275e47b0821cd628bf436ece.pdf?index=true
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_9b7e056969554de1b2773f44dc5adbc9.pdf?index=true
    • 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_off0000ea71.bin
513467a14db921602dc560cee073897000105a60c3c74a06d69b9d79e11ccaa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA71 5288 bytes
font_01_sfnt_off0000fc66.bin
517dcf95ebb8b1497206112f146376c3bdf812fa9130f84062ad436756eeecc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC66 10228 bytes

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