Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ffdcf63cb67197e…

MALICIOUS

PDF

70.6 KB Created: 2020-12-18 10:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2d54f6637c65c37987ff4159e1d51e29 SHA-1: f414b130a999acdfa7f6f725cb9553cb5f5c6385 SHA-256: 3ffdcf63cb67197ef472d1c7b5a22151ff768110a6445530aab49eee5eadf7ae
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://cctraff.ru/aws?utm_term=avast+free+antivirus+2017+exe In PDF document text
    • https://dukutisanag.weebly.com/uploads/1/3/4/3/134318107/b36af44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451377/normal_5fb7ebcc30833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488806/normal_5fa8756648c66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445320/normal_5fb952bf4e48a.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/zevoximunafi-jiwuvoxafem-xofotopafit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468537/normal_5fcfe4ec87d0c.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/pibomobuwarolotete.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/lafita_daxapujuwum_notugezi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0012c12facd59cea80d2a/t/5fc15a284e98326c0242bcc9/1606507048430/sears_craftsman_1_2_hp_chain_drive_garage_door_opener.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcec897058d4a6a57b729f0/t/5fd6b2550f11661d4c386179/1607905877757/3068283488.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4dd79d793648408483a6/1606372823856/stupid_test_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57256ec917750a3f64ce6/t/5fc707cb93ad1a481211bbe7/1606879180069/waraxojumarejesukazuvo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58dfc405d5340f3494730/t/5fd0f29a1058ec539c96527c/1607529115467/management_consulting_services_agreement.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eb456b97992eb55c2a22/t/5fcf2c723fa051062b420949/1607412851150/kolibogudurejidojow.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_off0000d7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D0 5252 bytes
SHA-256: cd33f47b2d426ed5d00c6da9039737799c069ac3a4f4b741b8f5899688fa4e8f
font_01_sfnt_off0000e9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CF 10544 bytes
SHA-256: 9b4a7f056007bdd2bba3a53c13520764a86eb06a9fcf9fc5e02e82141ec1ee10

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