Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc13eddf8bc2bc46…

MALICIOUS

PDF

80.8 KB Created: 2021-05-18 10:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8493c306d341b7b7cb27203b4517437f SHA-1: 03110a1841df84354637f07761b64a208fef1fbb SHA-256: fc13eddf8bc2bc4626d02fc756b711380568fc1063d80536b741f60b6a13e132
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://bologen.ru/strik?utm_term=diccionario+de+derecho.+autor+rafael+de+pina+vara+pdf PDF link annotation
    • https://wimukevefom.weebly.com/uploads/1/3/0/7/130739067/edab7.pdfIn PDF document text
    • https://somizinizerolu.weebly.com/uploads/1/3/0/8/130873918/limunesezosexin-baxemi-lotebumirawone-wozadojitipogox.pdfIn PDF document text
    • https://mokovudome.weebly.com/uploads/1/3/4/5/134598928/towogimun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413701/normal_605c1aed7cbc7.pdfIn PDF document text
    • http://galajanexagaj.iblogger.org/adding_and_subtracting_fractions_tarsia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406216/normal_5fee9048e0ba1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501975/normal_60017816874a5.pdfIn PDF document text
    • https://sezitekiporav.weebly.com/uploads/1/3/4/6/134627959/zedokusabuwosuxumog.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://fekepoloper.rf.gd/begudedegusakovogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b3a623-122f-48d1-ba90-84298d42ef0a/pickett_slide_rule_catalog.pdfIn PDF document text
    • http://selifesupenikiv.epizy.com/maxunapunadijugalula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed4a559-56db-42e3-a33f-66e19227bbd8/21522836578.pdfIn PDF document text
    • http://wobirazegezuw.epizy.com/66195275901.pdfIn PDF document text
    • http://segoxegigo.epizy.com/degrees_of_comparison_of_adjectives_worksheets_for_grade_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a619fbe8-eab9-4666-82f5-b8c72feaec64/arduino_uno_r3_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/cupid_and_psyche_story_moral_lesson.pdfIn PDF document text
    • http://bozejezetides.epizy.com/canada_boating_license_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/bikuxederedutewibevopufes.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/masked_singer_monster_performance_episode_3.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/don_bradman_cricket_game_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a70a76b-c9a2-4ad0-a5e7-619c478edd47/sisuxuwoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37025223-f66d-449e-aef8-9c61008c83ac/37369228156.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/how_do_you_use_the_mophie_wireless_charging_pad.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 5036 bytes
SHA-256: db7885cd5a837afc61b667aec3f24d3abf338462cc39ab6e94023a777ffea925
font_01_sfnt_off0000fef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF7 11844 bytes
SHA-256: 986f3003b2f23c12cabf65af513a85791ef980875aa199ac13cbcfb4f0701da8
font_02_sfnt_off00012569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12569 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3