Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c642e7ff4a76669…

MALICIOUS

PDF

65.8 KB Created: 2021-02-26 20:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 5c00617c314a4b5f8f6a429e69c475e3 SHA-1: 4d19f16a8751821972c8cd845e4fa127f29f4535 SHA-256: 1c642e7ff4a76669e42c75e6488e079df3b22dec14cd27f9e522f6f6c85b5ac6
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to an award or prize, aligning with common phishing tactics.

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 https://jacksth.ru/award?keyword=line+6+ux2 PDF link annotation
    • http://safijejog.mygamesonline.org/poxuvew.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/8PolCdS/33371076757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391621/normal_601841cb06e1a.pdfIn PDF document text
    • http://xruhdfo.site/accounting_is_an_art_or_scienceb7oup.pdfIn PDF document text
    • http://j3vnci4.xyz/la_novella_delle_papere_parafrasim5dhh.pdfIn PDF document text
    • http://repair-planshetov.ru/81294381781ibd4.pdfIn PDF document text
    • http://alluniversity.fun/gitetepebezolelofc323.pdfIn PDF document text
    • http://terugate.mypressonline.com/zevovelegarezazoveperur.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/technical_analysis_books_in_bengali.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/jjD8nbV/mini_ninja_bike_gas.pdfIn PDF document text
    • https://cdn.sqhk.co/salenasova/cR6Agel/operations_management_certificate_program.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/what_is_contrast_in_art_definition.pdfIn PDF document text
    • http://ru-dev.xyz/a_child_s_christmas_in_walesg335h.pdfIn PDF document text
    • http://www.satchmanshop.comIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/synergy_editor_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/mariam_khan_reporting_live_serial_all_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/g_p_sheet_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/80486990988.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/ba_1st_year_education_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/fasebomemenaj.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/management_report_format_in_word.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94B 4456 bytes
SHA-256: 55f26f9600be92b9c25241e556645bc1c2f571bca0d6d5d0fdfb91fe370c273f
font_01_sfnt_off0000d895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD895 9968 bytes
SHA-256: 443b27faf11f30a5e89ad38b62d47a265ecad1a1e44fa5eff4f2c4eb3653e24d

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