Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8c4a24e22a6e78…

MALICIOUS

PDF

76.5 KB Created: 2021-04-17 03:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bcb609621580e96af292bae70571b039 SHA-1: b1b7ba5ec93bfcfb6d142c26b668fb4505b8a036 SHA-256: da8c4a24e22a6e78e91879f5c4e691d96eade47e5d5a37aaea62c56959ba7aa9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The 'SE_REMOTE_SUPPORT_LURE' heuristic indicates the document likely attempts to trick the user into installing remote support software. The embedded URL 'https://seumenha.ru/strik?utm_term=can+you+eat+rice+on+an+anti+inflammatory+diet' is associated with a phishing lure, suggesting the document is part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/strik?utm_term=can+you+eat+rice+on+an+anti+inflammatory+diet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459921/normal_6052b28bec9c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421768/normal_6065b11f14742.pdfIn PDF document text
    • http://visionnew.xyz/khufra_hero_guidesg3ga.pdfIn PDF document text
    • http://logmeinnow.xyz/warelavufj16j.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/TlQhfhe/simcity_buildit_pc_download_gratis.pdfIn PDF document text
    • http://remontnatali.ru/arctic_king_8_000_btu_portable_air_conditioner_reviewsx4kap.pdfIn PDF document text
    • http://leftoutclub.com/las_chicas_de_alambre_personajes_principales0hins.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474218/normal_5fe109a6f00c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475989/normal_5fed9d02ac947.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/ltaAjcc/nattamai_comedy_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/kupibetefuko/injcjcx/monster_crafts_for_kids.pdfIn PDF document text
    • https://cdn.sqhk.co/govonesed/1AejfOP/slow_rock_songs_mp3.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/puretulenuza/gesagafizekuj.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/woduxuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/44628496133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33899f16-8552-4a08-8d37-76e0ccf6a90f/resofuluva.pdfIn PDF document text
    • http://xuvafojufiwel.epizy.com/pc_bluetooth_software_xp_free.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/67849659582.pdfIn PDF document text
    • http://wagulekamiwegur.rf.gd/expository_non-technical_writing_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e1f0316-2114-4c4f-ba91-73d46794f15d/nugijiruvejo.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/arduino_setup_free_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad7bfdc6-5d49-4a8a-a57b-26d94f7df86e/stihl_leaf_blower_bg56c_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e02358-3dce-423f-91bf-ed4ae860a3e3/mobile_application_development_books_for_beginners.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_off0000ee3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3B 4996 bytes
SHA-256: 2fe14463c97ec1882779728d6a8853eecb5db5bf4bdb7715b977e5334d3c7208
font_01_sfnt_off0000ff29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF29 10976 bytes
SHA-256: 39aa04a049875acb6d764ded07e0eaba19d706c2397dc626345ea3cce7f60139