Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff424884635eb61…

MALICIOUS

PDF

128.1 KB Created: 2021-03-05 14:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0190a36b7ba4d36f36f63420971230ff SHA-1: d784cd3e21e880c27b1dce0267f9a68fa547a169 SHA-256: 8ff424884635eb612d3211d545cab56192b330e27bd2b6c93ff7fe16e313fe17
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 embedded URI pointing to 'soxebez.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a historical disaster to entice users to click the malicious link.

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://soxebez.ru/award?keyword=did+anyone+survive+aberfan+disaster PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462344/normal_6035c7223512a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450347/normal_60344ecc793fd.pdfIn PDF document text
    • http://zoxodur.sportsontheweb.net/is_there_a_least_positive_integer.pdfIn PDF document text
    • https://cdn.sqhk.co/jaguwubax/ggvmgel/40474534452.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417414/normal_600157c98968d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465556/normal_5fcb9c5bc8865.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391620/normal_600508f1c3d53.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/cigEjcl/redamipu.pdfIn PDF document text
    • https://cdn.sqhk.co/nitumatemi/9jjgcif/basketball_kings_video_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501479/normal_5fcd5e60badd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386092/normal_6023e7116cb5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_60328e5d3343c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tafiwepamubov.atwebpages.com/the_trials_of_apollo_book_2_reading_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79e5be0d-7a28-47c9-95cd-e263274b2532/plantronics_backbeat_fit_6100_app.pdfIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_cbafde152feb49b3a8a9af006e1dc9ac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ed8a324-c71f-451c-9d30-cdfb537ba2fc/orbit_two_hose_timer_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70cb0455-b568-4e10-be23-8575e6892c14/blacks_law_dictionary_definition_personality.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10953b20-576d-4e26-8817-69410ce46485/the_animator_survival_kit_richard_williams_espaol.pdfIn PDF document text
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_7d0a418701cc4f929124ad5ac3252ffe.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001afeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFEB 5052 bytes
SHA-256: c028c3e16af7cc04b236e501d873a6bc9f53524433bb0e5fd96860ec178a0046
font_01_sfnt_off0001c12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C12E 10436 bytes
SHA-256: 7df0b6cb9283db7761d59fb93824c6a92f56768456e4f2b1c3666744fa2f6b04
font_02_sfnt_off0001e4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E4C2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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