Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c35edd1d5d2e8f…

MALICIOUS

PDF

83.6 KB Created: 2021-03-15 22:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f5efe942a1473369d289968a16869309 SHA-1: cae439c4e7b44e8dc69e6ad58142af8effcb7c0a SHA-256: 59c35edd1d5d2e8fa01697fb6af94e15bc93b479ce783d2f24fb7bdda8c68250
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, 'seumenha.ru', which is likely used for phishing or to serve a secondary payload. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/strik?utm_term=aimpoint+pro+review+2018 PDF link annotation
    • http://digovin.getenjoyment.net/diwidopapatatixozojarulu.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/sanumewileropuga.pdfIn PDF document text
    • http://didazema.mypressonline.com/what_conditions_and_or_raw_materials_are_necessary_for_photosynthesis_to_occur.pdfIn PDF document text
    • http://terugate.mypressonline.com/singer_4423_instruction_book.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/seasonal_work_in_canada_ski_resorts.pdfIn PDF document text
    • http://morasuxod.getenjoyment.net/10th_class_science_notes.pdfIn PDF document text
    • http://fuvufurewuf.iblogger.org/animal_farm_chapter_1_significant_quotes.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/xupejevubusonasuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://metusajixano.epizy.com/79055042310.pdfIn PDF document text
    • http://kezepinaxozegom.epizy.com/momoromidexebudiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bd8fb2d-4c38-4b26-b3a1-491359ac41c7/how_much_do_appliance_repairman_make.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/kayarian_ng_pang-_uri_worksheets_grade_8.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/wosudiligosigiguzabi.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/anoikis_pathway.pdfIn PDF document text
    • http://jiwodiw.myartsonline.com/waste_to_energy_journal.pdfIn PDF document text
    • http://figopovu.epizy.com/moi_baganiya_chora_song.pdfIn PDF document text
    • http://josesomesube.myartsonline.com/58743749092.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/playerunknown_s_battlegrounds_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/fativolevupuvavosajowuxu.pdfIn PDF document text
    • http://woxariwete.rf.gd/chemical_periodicity_review_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/tuxit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9fb69db-752f-4d01-b1c3-ca9d36980410/nuvogoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dffb031-9871-43e1-ab1d-4e3e28698a27/dowuponuba.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/decoding_words_with_prefixes_and_suffixes_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/american_red_cross_first_aid_cpr_aed_powerpoint.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_off0000f1ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EE 5204 bytes
SHA-256: a1e4f53c33a48ec7535b59ee40a22772785653d2d0e2386c0cbc7a3d75cde14e
font_01_sfnt_off000103aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AA 11512 bytes
SHA-256: 272eee331ad2037c35ad344843e5159ffaa0b4d9d064ff959922340c8c414ef8
font_02_sfnt_off00012afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFB 16348 bytes
SHA-256: 44344d777475bc27302cf71c6ce9e96b5edcb3cf6b8673c7cacff1863add0d01

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