Malicious PDF — malware analysis report

Static analysis result for SHA-256 44336955c7476a5d…

MALICIOUS

PDF

104.0 KB Created: 2021-04-01 21:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67ccaea118761a2e2524e300ec8c2d79 SHA-1: 534d946666c88b19c3d2507a27e1912a2efb62c4 SHA-256: 44336955c7476a5d3f79e022ac5e75ab99f88a71eecc7c17f3fa3c5718731cd1
104 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a phishing lure, specifically mentioning invoice or payment language. It embeds an external URI pointing to 'xezojetit.ru', which is likely the malicious payload delivery or command and control server. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://xezojetit.ru/award?keyword=capteur+ultrason+hc+sr04+pdf
    • http://tozepimituxagus.iblogger.org/70486782951.pdf
    • http://sinekem.iblogger.org/mandarin_chinese_english_dictionary.pdf
    • http://kezedidakopu.iblogger.org/25494281302.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e7ba4f66-d023-404d-a355-a5b98970f127.filesusr.com/ugd/cac9e4_55b4a3a8c9ae413d8af878c0f805c4db.pdf?index=true
    • http://buwumipulufi.epizy.com/lapabujeguba.pdf
    • http://mesovinofezesat.epizy.com/bobby_film_songs_free.pdf
    • http://juzuruwe.rf.gd/identity_property_of_multiplication_worksheets_grade_2.pdf
    • https://uploads.strikinglycdn.com/files/163abdc6-bb75-43ff-acb9-ac7b26d5157b/karumox.pdf
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_83d4a7c234d14742a41efd040c6417c1.pdf?index=true
    • http://nezepalonajiden.epizy.com/lanavarojepawogipumolofar.pdf
    • http://mafonoxerinomif.epizy.com/anatomia_microscopica_renal.pdf
    • http://demunoj.epizy.com/tumevala.pdf
    • http://nifiloxoburufi.rf.gd/thyroid_nodule_management_guidelines.pdf
    • https://f79c4d19-9b07-4ca9-ba82-4f938217db57.filesusr.com/ugd/c0d3e8_7af047bb8dad498d85645c29403753e7.pdf?index=true
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_fb38b333a6e044b89d44fd313432c857.pdf?index=true
    • http://zowolowoziru.rf.gd/babybjorn_baby_carrier_one_vs_air.pdf
    • http://wumevagijez.epizy.com/fanekalerori.pdf
    • http://pipovafalalum.rf.gd/bagupanuvefakibofusa.pdf
    • http://gitatujobewati.epizy.com/appearance_vocabulary_worksheet.pdf
    • http://lafanibawonol.rf.gd/19366132241.pdf
    • https://uploads.strikinglycdn.com/files/bec88f6c-f379-45e5-a150-f3899824aed8/the_water_is_wide_chapter_3_summary.pdf
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_7e06b8a3fa24450084d464e3ceac8d6c.pdf?index=true
    • http://makeromevoju.rf.gd/algorithm_design_and_applications_goodrich_solutions.pdf
    • 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_off000154be.bin
a9673df9f2fd2b1b722b19cd66d36496ae8880fdb4ba67996d60cc58053eff8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154BE 5380 bytes
font_01_sfnt_off000166ff.bin
edc71552767cb40718cd550bb18952ff1d5f622d6f7e78e107ae0194620df6b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x166FF 13464 bytes

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