Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c66aa6dc749b2ef…

MALICIOUS

PDF

71.7 KB Created: 2021-03-05 07:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 58dcc60aa6dd3e7a44f2c3eef4e21b35 SHA-1: 2b319cc70ff3f3be572730816d25869d83207e78 SHA-256: 7c66aa6dc749b2efa42f51db4f2d5d07aadf3f4bdd8080cae21ff5cbf5fcfaff
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://yafferge.ru/award?keyword=how+to+use+the+samsung+remote+control In PDF document text
    • http://favodokoleti.mypressonline.com/22534318086.pdfIn PDF document text
    • https://xatiletovolut.weebly.com/uploads/1/3/1/4/131409128/vimov.pdfIn PDF document text
    • http://sexurinugu.22web.org/nixoke.pdfIn PDF document text
    • https://kidodekorabatet.weebly.com/uploads/1/3/4/3/134320193/7c4b41ea8533e0c.pdfIn PDF document text
    • https://gikejujeg.weebly.com/uploads/1/3/5/9/135966421/9da43a2258.pdfIn PDF document text
    • https://vedexojofidas.weebly.com/uploads/1/3/4/5/134581268/4983588.pdfIn PDF document text
    • https://xadamunakufadi.weebly.com/uploads/1/3/3/9/133986396/ripexugiburere.pdfIn PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/8540021.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/46071646961.pdfIn PDF document text
    • http://bixuvetojotenes.22web.org/87707420185.pdfIn PDF document text
    • https://nixalimug.weebly.com/uploads/1/3/2/6/132680811/9746589.pdfIn PDF document text
    • https://dimebogative.weebly.com/uploads/1/3/1/4/131406505/tofeki.pdfIn PDF document text
    • http://nibewubixela.getenjoyment.net/gutixob.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/tawovojo/diagrammatic_reasoning_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/ny_giants_injury_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/how_to_start_a_legal_memo.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/where_to_buy_wahl_clipper_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/line_dance_step_sheet_gone_west.pdfIn PDF document text
    • http://limixumijegaf.epizy.com/87594666153.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/njals_saga_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/consumer_reports_subscription_mailing_address.pdfIn PDF document text
    • http://gagonunanu.epizy.com/sunezijuxuwite.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/zubutilumip.pdfIn PDF document text
    • http://zozadugaweguj.epizy.com/suwonegotunu.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/brawlhalla_gun_combos_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/antivirus_free_full_version_2019.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_off0000dbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 5264 bytes
SHA-256: fb8d70b03476e66c808c409acb4e79f9d8de20b30b88936a23ecc1a697b9429e
font_01_sfnt_off0000ed94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED94 10204 bytes
SHA-256: 172a4735d8d31d87ab9669e1fd5dbfc86d672ed11c01e812bdd13d5b561d8ebd