Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6aa7c63f939b15f…

MALICIOUS

PDF

80.5 KB Created: 2021-04-06 20:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5ac35a3f4e08e1fe1bb29b356ec96cb3 SHA-1: a340dbba134345c0d0537ec1a762f88a8780bb5b SHA-256: f6aa7c63f939b15fb6d9e212d72731eccb0d5541bad4f603094829c9adb91d6d
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains embedded URLs that likely lead to the download of further malicious content, masquerading as legitimate documents. The presence of embedded URLs suggests an attempt to trick users into accessing malicious resources, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/award?keyword=fundamental+of+mathematical+statistics+4th+edition+pdf PDF link annotation
    • http://tonaginu.iblogger.org/percy_jackson_and_the_singer_of_apollo_hardcover.pdfIn PDF document text
    • https://cdn.sqhk.co/godereliku/nhchfji/mulopapesawizebotoro.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/4852527.pdfIn PDF document text
    • https://namonivet.weebly.com/uploads/1/3/4/4/134493383/8845760.pdfIn PDF document text
    • http://luxibolozumuj.iblogger.org/rearrange_file_pages_online.pdfIn PDF document text
    • https://betijefozivur.weebly.com/uploads/1/3/0/7/130776077/c548553285bc41.pdfIn PDF document text
    • https://vijizonumek.weebly.com/uploads/1/3/6/0/136034009/dubidi.pdfIn PDF document text
    • https://bajorenurelop.weebly.com/uploads/1/3/0/7/130739037/63ad5bff5.pdfIn PDF document text
    • https://fegekoguresodod.weebly.com/uploads/1/3/4/6/134696623/lafefumadaxitarimu.pdfIn PDF document text
    • https://cdn.sqhk.co/wolowivem/mYGAnSl/college_algebra_exponents_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/gViihcO/aast_portal_questionnaire.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tivapatovike.epizy.com/atresia_intestinal_en_nios.pdfIn PDF document text
    • http://zegaruso.rf.gd/guwuput.pdfIn PDF document text
    • http://benepuru.epizy.com/cervical_cancer_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/766306872.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/yoga_flyer_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/pelayanan_rawat_inap_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/john_deere_24t_baler_for_sale.pdfIn PDF document text
    • http://nudobovedazopor.epizy.com/bekegulego.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/android_emulator_nexus_5x.pdfIn PDF document text
    • http://batogegimuwew.rf.gd/prepositions_and_prepositional_phrases_worksheet_5th_grade.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77B 5344 bytes
SHA-256: 823891deedfc79bb1f9d8b30f0083125b9f15c5a95ddfd751875677b615c7a43
font_01_sfnt_off0000f991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF991 11028 bytes
SHA-256: 6e76d36d68b7763f5f574c604a9d9f07686c8a83b059020ad38eba860ad88242
font_02_sfnt_off00011eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECA 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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