Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c00ce0a4f7881f9…

MALICIOUS

PDF

71.4 KB Created: 2021-03-13 15:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bd5aec0ce3bcfda4d246caf62cdd1ebe SHA-1: b25e4b275ad67b282e472cf5414d961d205033c7 SHA-256: 4c00ce0a4f7881f98fbb839ed2a1098ecb645da5da1bdf552e1ff90aaec49615
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'soxebez.ru' which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Adobe acrobat xi pro pdf to word' and 'wkhtmltopdf', suggesting a lure to trick users into interacting with the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/award?keyword=adobe+acrobat+xi+pro+pdf+to+word PDF link annotation
    • http://obschee.xyz/50441210624gd0ih.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426060/normal_6003a5c0b1827.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/bapulixu.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/76343710107.pdfIn PDF document text
    • http://bogplaktnc.fun/how_to_change_schlage_door_lock_code47bnw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445320/normal_603e60fa550ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410216/normal_6030fe27a926b.pdfIn PDF document text
    • http://giboxibefelas.22web.org/ei_online_reporting_phone_number.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383136/normal_5feb24c9cb72b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386621/normal_6023ba880d3e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nilifejafajow.epizy.com/analytic_geometry_and_calculus_2.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/beachcomber_hot_tub_manual_340.pdfIn PDF document text
    • http://xonizud.epizy.com/remusobegozesate.pdfIn PDF document text
    • http://powajokex.rf.gd/operations_management_certificate_courses_in_india.pdfIn PDF document text
    • http://kawojimulogizef.rf.gd/81205792768.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/99041352012.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/63423286611.pdfIn PDF document text
    • http://zebofazedixa.rf.gd/braun_series_7_shaver_user_manual.pdfIn PDF document text
    • http://rapaxaj.rf.gd/20816177786.pdfIn PDF document text
    • http://nufudojor.epizy.com/free_cracked_apk_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/66484136343.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/the_masque_of_red_death_setting.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_off0000d7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E4 5228 bytes
SHA-256: c76277d7b4a958dcaec9bc96d5896fe1b4139938bdc853ff361bad0ff6ed816f
font_01_sfnt_off0000e9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D4 10920 bytes
SHA-256: bad1c796d3bcbf5fbebd73d6efa74c8f1d4a731bd2744eba131a6af17fc99c45

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