Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97a973405f690f4…

MALICIOUS

PDF

76.5 KB Created: 2021-04-10 17:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fd6c644cf740f725caae6fcbe0a3a8d6 SHA-1: d80aef946e25bd42b706c548085269f1c192fb37 SHA-256: f97a973405f690f40ca200cae3345e79fd9ab1610fa1d9d466f99e1399037eab
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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://pelibifir.ru/strik?utm_term=how+to+set+up+thinkorswim+indicators PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464056/normal_601e01b10d755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_602b371fec98d.pdfIn PDF document text
    • https://cdn.sqhk.co/janurisu/igib6sq/fashion_plates_design_set.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/similar_triangles_worksheet_grade_7.pdfIn PDF document text
    • http://santand-es.com/99946720670m0aal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_605fdc7054fa8.pdfIn PDF document text
    • https://cdn.sqhk.co/lokuwanij/gfYPejF/69062718671.pdfIn PDF document text
    • http://fizarumokugafu.mywebcommunity.org/python_arithmetic_operators.pdfIn PDF document text
    • http://organicnu.info/bifegusus0c54q.pdfIn PDF document text
    • http://rubeatyshop.xyz/joleriniv0gv0f.pdfIn PDF document text
    • http://vukuradi.mygamesonline.org/application_software_list.pdfIn PDF document text
    • http://ig-support-service.com/suzivammp07.pdfIn PDF document text
    • https://cdn.sqhk.co/penavagalo/hhTijgT/brooklinen_core_sheet_set_review.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/fhfhfjN/ultimate_vpn_full_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zatufora/egeBjcs/durapoxomepog.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/if81SDv/how_to_change_nintendo_switch_parental_controls_pin.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/jf7jcii/slices_and_ices_rockaway_park.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/zategafozasiru/illustrator_magazine_design_template.pdfIn PDF document text
    • http://buzanuziti.myartsonline.com/streamline_english_departures_teacher_s_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/good_video_editing_apps_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/kozavaxefuvivefitoroz.pdfIn PDF document text
    • http://jasesazolaf.myartsonline.com/cabrio_dryer_does_not_heat_samsung.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/objectives_of_social_work.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_off0000ec6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 5400 bytes
SHA-256: 33c2065d95e8b6168693ed5e792b8f9eeebb3b58652f4807b615d2beee26df04
font_01_sfnt_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 10572 bytes
SHA-256: 4842438b4aaaee8d33f6a58954f12fe46a5b55125178472799484516d7f400c2

Open this report in the interactive analyzer, or submit your own file for analysis.