Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee850ede3696f980…

MALICIOUS

PDF

76.7 KB Created: 2021-03-13 15:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b33f67a5fa97b47dcf9e807941f7e774 SHA-1: e3a03b84bbdfc9b383b0fc0e87b4c95da47c17b1 SHA-256: ee850ede3696f98048c9595b80fedbd335d744a88fce07f6664718fe584b523f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and a machine learning classifier. The document body, though heavily obfuscated, suggests a lure related to 'Meningitis guidelines pediatric'. The presence of external URIs and the nature of the detection indicate a phishing attempt designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/123?utm_term=meningitis+guidelines+pediatric
    • http://pevojatinolotej.22web.org/83416856607.pdf
    • http://xepuxupipe.mywebcommunity.org/sindrome_anemico_2020.pdf
    • http://dipazekonowa.mypressonline.com/operating_systems_three_easy_pieces_remzi_arpaci.pdf
    • http://tofotibuwul.sportsontheweb.net/pharmacology_made_insanely_easy_barnes_and_noble.pdf
    • https://cdn.sqhk.co/kawiwitifa/ifzhjQl/sodonukefagizunuzora.pdf
    • https://cdn.sqhk.co/nukusigemug/3icwUha/towabagazusobut.pdf
    • http://bowoporoj.iblogger.org/medimoxigetenikamizijemos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b14da5ff-e31f-4326-89f5-ef8532c75b8e/3752929807.pdf
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_00b5ca4a8ddd4ac0af413f34145f4ae0.pdf?index=true
    • https://s3.amazonaws.com/kozibowisenatu/lonujudowasonakebulo.pdf
    • https://s3.amazonaws.com/xarojapi/sciatic_nerve_flossing_piriformis.pdf
    • http://zifekop.rf.gd/73031036456.pdf
    • https://s3.amazonaws.com/dadupawo/fluke_337_clamp_meter_datasheet.pdf
    • https://uploads.strikinglycdn.com/files/c63f83a0-ec94-411e-8931-823597c6fca3/2004_dodge_ram_1500_fuel_pump_pigtail.pdf
    • http://zibozepor.rf.gd/what_is_the_book_wonderstruck_about.pdf
    • https://uploads.strikinglycdn.com/files/2112548c-3929-418e-8272-7b7e1141f956/46569092376.pdf
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_ec9cd0838022480596a1e2274fef8d44.pdf?index=true
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_f466b661cfc5447987cc981faa3993e8.pdf?index=true
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_d902f3a065314bc98e4470fc8dc22f60.pdf?index=true
    • 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_off0000ee80.bin
d4e3d893d5d5696f7ae5e03ec97cfb3486e3f911e49a88552b040049d1d4a9c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 5248 bytes
font_01_sfnt_off00010074.bin
bc4e640048cdd9cc6686c39fef943e771c22d596f3e7944274c0ed33cc4b29e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x10074 10840 bytes