Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb78b57fc2d927f7…

MALICIOUS

PDF

73.2 KB Created: 2021-02-17 20:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f73e5e4240884d91d866bf76a65c3375 SHA-1: a9edb033035c5976e8b0d8ae2629984d6b8c4887 SHA-256: fb78b57fc2d927f73570aefbfd8313a0a9766ead784cd22d29cf438154e3a5f4
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wix?keyword=heredity+worksheet+for+middle+school PDF link annotation
    • https://cdn.sqhk.co/fadejiweruw/iaja2ja/video_search_for_youtube_free_music_videos.pdfIn PDF document text
    • http://bikuribowe.22web.org/video_game_neophyte_informally_crossword_clue.pdfIn PDF document text
    • http://fabulouss.space/piwixerenedisimawerikuphs79.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/58820457447f8quv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494875/normal_601b674c5166c.pdfIn PDF document text
    • http://businessoutsourcing.info/vepokalipotakanimalacy3e.pdfIn PDF document text
    • http://tosanelelodidot.iblogger.org/81702999310.pdfIn PDF document text
    • http://therarbooks.com/818012809099njy7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vasofirida/palefutewijeriwefer.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/princeton_review_sat_book_2018.pdfIn PDF document text
    • http://zasidad.epizy.com/ap_calculus_ab_textbook_answers.pdfIn PDF document text
    • http://tivapatovike.epizy.com/chest_guidelines_anticoagulation_2018_pulmonary_embolism.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/jaliluzilu.pdfIn PDF document text
    • http://zosajirigo.rf.gd/solid_liquid_gas_ks2_worksheet.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_off0000e35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35D 5268 bytes
SHA-256: 43c0cbca5287920361621828a652513274c7f32f1c9306a2815c00afd21211ab
font_01_sfnt_off0000f53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53C 10060 bytes
SHA-256: 575c78b5e1d353e56edfb9e812d3a065490f4262aeeedca741f12ef4f030a526