Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1818ecb7b197916…

MALICIOUS

PDF

76.8 KB Created: 2021-02-19 22:22:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c0cfd4f71973ede64fed521185d6c07d SHA-1: cf25c30fb682950b270eb0cbf2b2bb905b824e73 SHA-256: e1818ecb7b19791674d6e3e40f4115e848f969770e4e0cc882453c5c15358c35
184 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=california+common+core+math+4th+grade+worksheets In PDF document text
    • https://cdn.sqhk.co/dabozijide/6hghccO/tunnel_rush_2_players.pdfIn PDF document text
    • https://cdn.sqhk.co/nukuzulu/fjdid8k/road_builder_highway_construction_games.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/ier9wid/how_to_make_origami_ninja_star.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/gjgh7d5/demedax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480142/normal_601314a26f1ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477400/normal_601ede9579971.pdfIn PDF document text
    • http://zemegulobeka.iblogger.org/21928773139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391037/normal_600f5360a1dff.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzikewed/hhchdJZ/sufagazogojajizoroz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wexejobi.rf.gd/magazine_template_for_microsoft.pdfIn PDF document text
    • http://kunivoji.epizy.com/bodybuilding_images_hd_free.pdfIn PDF document text
    • http://wokoguzesel.rf.gd/70865331805.pdfIn PDF document text
    • http://rizukapusapanom.rf.gd/remedies_for_breach_of_trust.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/musofisapuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/avaya_communication_manager_7._1_installation_guide.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_off0000ed39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED39 5584 bytes
SHA-256: 9c188c9f7e062be93199f9052da5de92a38b7afff6b5f2d12613244b07dc2506
font_01_sfnt_off00010025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10025 11476 bytes
SHA-256: 52c4969b65c82351168a1ee3528404bf79fcc9bbfc392083da5e2dacb607a137