Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10c078fc3b4cf35…

MALICIOUS

PDF

67.2 KB Created: 2021-03-29 23:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc4c86564f1a6cd8c96e7a479455fa8f SHA-1: 1b79258f68645fd663699053a2f410068a10996c SHA-256: e10c078fc3b4cf35de70f16e18dfdc25e09e0f02d127ad5d88f28a4bc1941ac0
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru', which is likely a malicious domain used to host phishing content or download further payloads. The document body, though heavily obfuscated, contains references to 'Burmese days pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise malicious intent.

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://zajinet.ru/strik?utm_term=burmese+days+pdf
    • https://dolumipekino.weebly.com/uploads/1/3/4/6/134625527/7fb6f546adcbbee.pdf
    • https://cdn-cms.f-static.net/uploads/4426810/normal_5fd160df87557.pdf
    • http://fikakutipid.mygamesonline.org/rent_agreement_format_mumbai_marathi.pdf
    • https://wepopoxewu.weebly.com/uploads/1/3/1/1/131164118/3310ecf26b.pdf
    • https://cdn-cms.f-static.net/uploads/4373782/normal_6022161be2e8f.pdf
    • http://kutakelipaxeb.22web.org/axial_flow_fans_and_compressors.pdf
    • https://tutuludoj.weebly.com/uploads/1/3/0/8/130874598/6beb914c5f9.pdf
    • https://cdn-cms.f-static.net/uploads/4406809/normal_6023d6471eef6.pdf
    • https://darifojiwuz.weebly.com/uploads/1/3/4/5/134588766/48e9f8.pdf
    • http://jotetifijenosif.iblogger.org/supply_chain_management_information_system.pdf
    • http://buvevevonukaxe.iblogger.org/what_is_the_molecular_formula_of_protein.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gopudagob.epizy.com/oven_ready_lasagne_sheets_asda.pdf
    • https://uploads.strikinglycdn.com/files/3f7d9584-6099-4fd7-8cf1-582ab5a6439a/35274310565.pdf
    • http://pimogajen.epizy.com/kafogowimekusiweko.pdf
    • https://uploads.strikinglycdn.com/files/d4bb2551-10b4-4bf5-a929-17a9d0dcbec9/96802113978.pdf
    • https://uploads.strikinglycdn.com/files/f5c94e68-03d7-4ebe-8913-4828125464fb/42665133892.pdf
    • http://jadukubilelib.myartsonline.com/about_computer_hardware_download.pdf
    • http://tubiruk.epizy.com/4_actions_framework_template.pdf
    • http://rimelilowima.rf.gd/xelux.pdf
    • http://genorokotejivo.rf.gd/83137341077.pdf
    • https://uploads.strikinglycdn.com/files/94e05ae7-9be9-4848-8e68-900d3b85b93b/ip_address_for_tm-ac1900_router.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_off0000cc7b.bin
904e4ea2d1f215e9c13b315fbe5ac05eda5d14ba3c439ddc4c1790b923a74484
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7B 5308 bytes
font_01_sfnt_off0000de77.bin
51d25775c2f0724f4b1408dd1775320be5d562caff402d15bdc1e130c799aa54
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE77 9796 bytes