Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87afdb45c1a17de…

MALICIOUS

PDF

79.2 KB Created: 2021-04-08 16:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: db0406a568f59f19f06485355d206c16 SHA-1: 8ce9f922a2197af894bd0b1e92c8014547d0e77f SHA-256: d87afdb45c1a17deec81a461f5ee055d73fdc92347e353ba5afd1a68b9d62644
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 0.9996

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://jottigo.ru/strik?utm_term=which+two+elements+only+need+two+valence+electrons+to+be+happy PDF link annotation
    • http://helpcenter.business/are_asus_graphics_cards_goodjtkes.pdfIn PDF document text
    • http://idealslimitaly-official.site/troubleshooting_hp_officejet_pro_8600_wirelessu7rh3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496577/normal_60314c76ea773.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_606ab18e8a358.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/70521016245xen6c.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutowede/ewjbMhg/lojowukemajodejemojo.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/ij1rheF/mini_arcade_two_player_games_list.pdfIn PDF document text
    • http://foxudenop.iblogger.org/bankersadda_current_affairs_june_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/gigemuji/je3jjhj/41148827178.pdfIn PDF document text
    • http://bestita.space/82043972943eo263.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/70d2ad40-a124-434f-88a2-e5c1c8a5015a/watch_the_alchemist_movie_paulo_coelho.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c23ecd40-27cb-4e51-bf41-fd0fe1eda44a/xfinity_error_code_srm-8001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab8f20d7-af1f-4a37-b7bc-54769cc3d739/julidunuligojoj.pdfIn PDF document text
    • http://bomepexajusopa.epizy.com/colostomy_dietary_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/779fcbfa-bc3f-42d4-847f-e92fb5fe14fe/the_art_of_acting_stella_adler_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b5fa8a-b859-4c95-9924-710705932eef/peavey_classic_50_specs.pdfIn PDF document text
    • http://zilemugas.epizy.com/97504933439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a307fcc5-c745-48bd-87c5-a972b2d536cc/51327047994.pdfIn PDF document text
    • http://wowijikozo.epizy.com/dudowajonavinud.pdfIn PDF document text
    • http://toledufebemal.rf.gd/futirutebesovud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d855bd3c-95ae-47ed-b4a8-23faa580f7c6/why_is_my_oven_not_working_at_all.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_off0000f690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF690 5720 bytes
SHA-256: 4269ab8f2d56605cd4168e3b675a6cf6d1e717a811878cb9138c5db5dd0c5615
font_01_sfnt_off000109f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F7 10604 bytes
SHA-256: 6ce3879cbade7193c3e186ea355036910733d43b62163a9f0ecf77d7d6aa101b

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