Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b03f2c34dea2f7…

MALICIOUS

PDF

71.1 KB Created: 2021-03-14 15:59:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 798c84d200d23ba9a58ccdbeb0cf0b8b SHA-1: 75fc2932928101d0bd84db13166baf598e55fede SHA-256: 21b03f2c34dea2f75d4a0d13d4d2698b656213d1af6de53e6e275821dac1774f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating it's a phishing trojan. It contains an embedded URI pointing to a website that claims to offer 'Catholic praise songs PDF', likely a lure to a phishing site. The file's metadata indicates it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, suggesting it may have been dynamically generated to appear legitimate.

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 https://seumenha.ru/award?keyword=letra+de+cantos+catolicos+de+alabanza+pdf
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/9acd09b8.pdf
    • http://leninuludobodu.mygamesonline.org/hummingbird_depth_finder_helix_9.pdf
    • http://startbastar.online/why_is_my_fisher_and_paykel_fridge_freezer_leakingidhq9.pdf
    • http://vsedlyatebya.xyz/childhood_asthma_treatment_guidelinesbyxt0.pdf
    • https://lelodudovoveju.weebly.com/uploads/1/3/1/6/131607117/vopig-pipoxa-jupinaziwekozob-lurobe.pdf
    • http://kevarusakoko.mypressonline.com/the_final_solution_chabon.pdf
    • http://sowipilarow.mygamesonline.org/fundamentals_of_electrical_power_engineering.pdf
    • http://dosubodanes.mypressonline.com/zesigibape.pdf
    • https://sirowatogiwu.weebly.com/uploads/1/3/2/8/132814809/d0f3a09.pdf
    • http://natnat.fun/uncle_toms_cabin_childrens_editionl0kog.pdf
    • https://cdn.sqhk.co/duravukikemo/nQPDdia/dozinejokegupalezoxija.pdf
    • https://cdn.sqhk.co/jekidase/jf6jiKy/11939234948.pdf
    • https://dupemokuko.weebly.com/uploads/1/3/4/7/134759865/1874655.pdf
    • http://ligugiban.scienceontheweb.net/96677155234.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_bcc340683d9f4006a6db365e184d4879.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4f448c6e-9050-4138-8c73-67eda6f5bcce/dujuvivigopasasolosewi.pdf
    • https://uploads.strikinglycdn.com/files/6693c6e6-3881-420a-8d58-837bc87d9c27/maluwa.pdf
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_5af26b99ed014de0ac5febfc62aff0f2.pdf?index=true
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_9264d96b05dd4ee3a2d06eeb2cdd803c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c1d826ba-a9dd-4185-b031-ca5cb0c5d959/zaxofajodowunemul.pdf
    • 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_off0000d6a9.bin
f1e622992ca8b4f8953d4a9fb4b4d141c5dbf11e5e7e6b605779422227862789		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A9 5280 bytes
font_01_sfnt_off0000e8b3.bin
f5d8d52e95682d87c5edb1af3f03d1fc602165f11f0673f5676de0cd08f8cf9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B3 11272 bytes

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