Malicious PDF — malware analysis report

Static analysis result for SHA-256 917fed6de9f302da…

MALICIOUS

PDF

82.7 KB Created: 2021-06-05 21:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2ed3058cb446c33e7ad0f2fe3151c000 SHA-1: dcab817168a01775d3ecd4e6d44bed4e5c41aba4 SHA-256: 917fed6de9f302dac76e9a901e08a990ec6d9eb127aae37a00e2675830a58159
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 0.9997

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/123?utm_term=google+analytics+logo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463792/normal_601598e11839d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_606e647e5398f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460706/normal_5fd117ab42f65.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/3ea89c76-5fd3-473c-94a2-4b71d9b8e738/vorosoroputumopot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90bab3d4-4449-45a5-9016-633d6e04d1fe/59510462821.pdfIn PDF document text
    • http://malamojozag.pbworks.com/w/file/fetch/144577755/rekojomepibalafedamim.pdfIn PDF document text
    • http://minuwaxiper.pbworks.com/w/file/fetch/144522747/44151759766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e697d68f-ff7e-4dcf-8dc6-7b2fa53b6ab5/cules_son_los_tipos_de_comunicacin_virtual_que_hay.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144426732/volos_waterdeep_enchiridion_trove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54470762-67a9-4a5d-9fac-048b0b7b6718/analisis_de_los_personajes_de_100_aos_de_soledad.pdfIn PDF document text
    • http://sonopewobu.pbworks.com/w/file/fetch/144417936/american_pie_reunion_full_movie_in_hindi_dubbed_download_filmywap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e92818f-4868-4ffc-977c-f774f26ef2f7/36045776745.pdfIn PDF document text
    • http://rawumadakora.pbworks.com/f/50220574674.pdfIn PDF document text
    • http://zuvevetub.pbworks.com/w/file/fetch/144578217/punctuation_practice_worksheet_answer_key.pdfIn PDF document text
    • http://jizakatum.pbworks.com/f/7183181886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81d8ce8-2d55-4f1b-a322-8f4fb312bc24/40025036587.pdfIn PDF document text
    • http://dejulagimu.pbworks.com/f/how_to_stream_audio_on_discord_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d309b2c8-b30d-43f4-995c-6de0206993dc/20503723094.pdfIn PDF document text
    • http://najajadux.pbworks.com/w/file/fetch/144624264/lozedebedulamevajapikefim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b6dbe1-df07-4a38-af60-8b9961996ed7/hp_laserjet_p3015dn_printer_datasheet.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_off00010462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10462 5004 bytes
SHA-256: d1641af3ad71f650b4895d4f873461b1223808a909ba56ce8122f84c4f10fff1
font_01_sfnt_off0001158e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158E 11548 bytes
SHA-256: d6e11ebd7f0992e664a94bee62ea050cd1efe5b92bcc8a7a2b59dbf710fd7b3b

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