Malicious PDF — malware analysis report

Static analysis result for SHA-256 6428ded3dfd1f039…

MALICIOUS

PDF

72.0 KB Created: 2021-04-01 13:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aef27eb39b9b277dbe71c1b9f125b90e SHA-1: e1d377e36a474d517ab91e6e91529eae9181798b SHA-256: 6428ded3dfd1f03945f7e53a8ae3cc71f3f973c71d1647ebb73e2fac7c98ec92
96 Risk Score

Malware Insights

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

The file is a PDF document that contains multiple embedded URLs, one of which is directly associated with a heuristic firing for an external URI. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to file conversion, aligning with a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://midufefew.ru/award?keyword=converter+pdf+to+word+online
    • http://dalnoboyi.xyz/california_bar_exam_criminal_law_outlineahevq.pdf
    • http://copytoshka.ru/tagutuzinogagetixegogbzqr.pdf
    • https://cdn.sqhk.co/ronofumito/jXJihk2/download_game_nba_live_mobile_basketball_mod.pdf
    • http://dreabling.online/bemefutotomabanezorukxxct.pdf
    • http://gakawisogafuga.mygamesonline.org/neonatal_sepsis_guidelines_2020.pdf
    • http://bajifepeselok.sportsontheweb.net/cancer_de_mama_minsal.pdf
    • https://cdn.sqhk.co/vafodagusun/iiiehaG/oklahoma_natural_gas_stove_rebate.pdf
    • http://usblighter24.site/book_report_templates_for_grade_4b71yq.pdf
    • http://saxobupazes.sportsontheweb.net/87660505210.pdf
    • http://wokimagomabutof.22web.org/tagidexofemaliwaxoxex.pdf
    • http://jalojewaga.mypressonline.com/57919684341.pdf
    • http://rukozhop-guide.com/electrical_hazard_risk_assessment_templatel6u3m.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/77608332-b93a-4ebd-8969-f6c20153755d/vilogasegelasedaxepibawu.pdf
    • https://uploads.strikinglycdn.com/files/ad709b34-acc6-47a2-90aa-351d564c51b8/49875802590.pdf
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_d30e489612684e34baaaa4d3cad1f545.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1a3d8782-ee16-4c2d-b732-20e258e66ad3/90955812806.pdf
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_81dc42b262374599a2d5100c92f7e787.pdf?index=true
    • http://tetexamafikej.epizy.com/hi_tech_bluetooth_usb_driver.pdf
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_33f74f46226143d6a772c9c718ce88e4.pdf?index=true
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_b9bf39951ce445469584a2c49b28985b.pdf?index=true
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_d0e23c4ea29a42a1a64a2721fc7d5cf1.pdf?index=true
    • http://gekolutewubel.myartsonline.com/8946027718.pdf
    • http://gobovavori.rf.gd/ligutijoraligabitamo.pdf
    • http://rozopujonabesix.epizy.com/5385626536.pdf
    • https://uploads.strikinglycdn.com/files/43de9bd4-7945-45f8-b07c-9ed2b9a68113/mainstays_corner_computer_desk_assembly_instructions.pdf
    • https://uploads.strikinglycdn.com/files/673f8f9e-ceef-4ee5-a0ee-e9c07658821b/lopawenoxabajunupumijizu.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_off0000dde6.bin
2aa2416d3ef3edf9fd0d22810f6c68d39d108e1e54553d728a143110d6486fc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE6 4704 bytes
font_01_sfnt_off0000ee0b.bin
5099914643462f2610b87d52cf925819d8109f346ffc76f0e20c8a5c40bf75b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 10684 bytes

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