Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9752b41993ee4d5…

MALICIOUS

PDF

77.3 KB Created: 2021-03-14 04:21:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a7dcb2f8aaea5402ee2422e9af867703 SHA-1: 197a84e1979699a6906297049cbf148eee0149c4 SHA-256: d9752b41993ee4d548d42ba12a5fa378f234deaed1888dca33e1939294cff55d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning or redirecting users to malicious sites. The primary malicious URL identified is 'https://midufefew.ru/award?keyword=el+capitalismo+en+mexico+pdf', which is likely used to distribute further payloads or conduct phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=el+capitalismo+en+mexico+pdf PDF link annotation
    • https://bubebozozuj.weebly.com/uploads/1/3/1/8/131871643/sokozegudar.pdfIn PDF document text
    • https://nunavataregexo.weebly.com/uploads/1/3/0/7/130775742/kolon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea0d8ab6-199f-4a8e-8f87-34e087d10bde/bopusatoximi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37650709-1d1f-4ae3-8062-c564c77d7394/nileritofujexap.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/music_mixing_and_mastering_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aeeb89e-6aed-4d0f-8561-596848fe686f/craftsman_lt_1500_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/56574173677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80341fc2-f304-47df-9d5c-0210f5eb1005/why_does_my_co2_fire_alarm_keep_beeping.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/buwodom.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/antaranga_bengali_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/24779024093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99fa9093-4ad9-419b-adad-65ee644c5658/how_to_win_one_night_ultimate_werewolf.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/star_wars_the_force_unleashed_game_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/924944b7-9212-44aa-a441-84d98d7e15e4/37729253313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5977f862-005a-46f6-8546-162398b81c28/venigegeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f7b79db-75b2-49d0-ac2c-d7cc130d7853/33087337947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6441e61c-5a8f-47d3-98af-03c9fc34525e/autocad_lt_2020_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425311c8-fa12-4910-9660-983ce3ff8899/wordpress_templates_for_professional_photographers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEF 5228 bytes
SHA-256: bd0f1c27f32bb8c8eab149a83638ab0b5f8060a9bed4b35f131b0be60dcf3b71
font_01_sfnt_off0000feb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB5 12408 bytes
SHA-256: d077367d7700053e716b8cc6f2e4a940037b72004b0337eafd748c48a95c1713

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