Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede01e9896ac6285…

MALICIOUS

PDF

97.6 KB Created: 2021-04-06 08:27:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c98851011622166207ec9b33fb84e035 SHA-1: 21c7dc1ca9448f7960e94056c85618f2bb129e0a SHA-256: ede01e9896ac62850c865613641d79dbed435fd63f4c45373e104f63dc8c88fe
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to 'Budwig protocol book pdf' and 'wkhtmltopdf', suggesting a lure to download a malicious file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://dafemum.ru/award?keyword=budwig+protocol+book+pdf In PDF document text
    • https://cdn.sqhk.co/xaripisi/hhjjdhd/6841036129.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/eJmhnob/banana_kong_blast_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/powosinubuk/hichchd/can_i_build_android_apps_with_python.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kisagoz/heroku_pg_backups.pdfIn PDF document text
    • http://mujijebal.epizy.com/82406491020.pdfIn PDF document text
    • http://ramamezez.rf.gd/mobuguva.pdfIn PDF document text
    • http://rokabimokow.rf.gd/mibebagozilakisetixonit.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/chess_notation_sheet.pdfIn PDF document text
    • https://a82c121c-2200-4cd7-aff6-47cf910fdadb.filesusr.com/ugd/117c17_1f77445c1e62403d9040406ef43e8231.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/iowa_dnr_deer_reporting.pdfIn PDF document text
    • http://fabotiwes.rf.gd/blender_cycles_materials_free.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/wuvaguxom.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/20946372482.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/foursquare_city_guide_revenue.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/962818560.pdfIn PDF document text
    • https://36d3fe4d-ce77-4ecd-ae21-04b42370c250.filesusr.com/ugd/871c54_2358159596d141a2967dc4b771d942ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasutiz/jabuvazonugul.pdfIn PDF document text
    • http://lekanewome.epizy.com/83670083779.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/bhaagamathie_movie_telugu_tamilrockers.pdfIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_8d88cad0f91e47edad9e917948ed3f8b.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000131e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E3 4936 bytes
SHA-256: fbced804d339d7bd63acb2151c862324101de3ed771b99bc4b0f81f704e50763
font_01_sfnt_off000142d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D9 11372 bytes
SHA-256: 74d0aa19109b879f13ba37a42acda99873926c98aae4c30948da6592311bde4a
font_02_sfnt_off0001697a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1697A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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