Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c341c53d3517968…

MALICIOUS

PDF

76.9 KB Created: 2021-03-22 18:14:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 94a003659953cc9ba6672244e85ff789 SHA-1: 595f0f9303cfb0c7d9de0e66a9b05ebd81a5cd2e SHA-256: 4c341c53d3517968e2feeebf8ab29aa3cdc314c4948a8782c30052379a640b5d
96 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain metadata related to document generation and potentially keywords for search engine optimization, further supporting a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/wix?keyword=9th+grade+literature+and+composition+standards PDF link annotation
    • http://sitebomobegux.sportsontheweb.net/magazine_online_read.pdfIn PDF document text
    • http://gejejasofubi.mywebcommunity.org/puruvogirijiresuvazis.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/99_names_of_allah_flashcards.pdfIn PDF document text
    • http://rajonilelubej.22web.org/articles_on_importance_of_education.pdfIn PDF document text
    • http://sexugaweguko.iblogger.org/puronux.pdfIn PDF document text
    • http://tiburozikibuvex.22web.org/education_powerpoint_templates_free_mac.pdfIn PDF document text
    • http://gagipelujer.iblogger.org/31332181070.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gedexim/ps3_controller_on_pc_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/ascending_order_worksheets_for_ukg.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/does_scansnap_ix500_have_twain_driver.pdfIn PDF document text
    • http://vafosune.rf.gd/guzeganekurif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16ae19ac-eaf7-41e6-81bf-d8d33b9d574f/kekunifeduwekusapimugaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/979758cc-1f7d-4c7d-9b0b-d4218f9e8c53/is_christmas_eve_a_holiday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d728e6-f3ec-4cad-96f5-1eb169a28e72/xibufejuzazij.pdfIn PDF document text
    • http://gotobixeg.rf.gd/pdf_squeezer_app.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/51062979496.pdfIn PDF document text
    • http://lafeseg.rf.gd/96103779320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba850f7b-4e34-4a58-a0d7-4797bf72dab1/stuccios_pizza_menu.pdfIn PDF document text
    • http://jujabezemaluwe.rf.gd/zibepaxixekigenugeb.pdfIn PDF document text
    • http://lexegeverurejeb.rf.gd/58421221713.pdfIn PDF document text
    • http://bezukovopobav.epizy.com/nugabalobiguzegu.pdfIn PDF document text
    • http://gujomodezeroj.epizy.com/86754705962.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/is_procreate_for_ipad_only.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_off0000eb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0D 5548 bytes
SHA-256: fc7a0f924d014c1b27f87dfc1f43aa229e971f08311e6d0ee853d6cfb880590f
font_01_sfnt_off0000fdbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBD 11268 bytes
SHA-256: e461d22db4dedb48f6df490579379aa9dbc820caef2ea66174d4a8e7aa1ba6e7

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