Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc03631fcd682574…

MALICIOUS

PDF

59.4 KB Created: 2020-11-11 01:30:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ec4ed4f7dc3d03f40a10d56c1ac5f489 SHA-1: 447a2ddc4b3cf0b2efdd84ec6eb8c1894dc821b4 SHA-256: dc03631fcd682574f56f669766c9ec08c8653c2a769240a6d1580f2a633ffd7c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://traffmen.ru/strik?keyword=pimsleur+pdf+download In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/fubisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_5f8fd7edd2a75.pdfIn PDF document text
    • https://lopuzidijunusi.weebly.com/uploads/1/3/4/3/134378181/fesaguduw_jezamedojifupo_puragelo_lewajap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f9493784a04a.pdfIn PDF document text
    • https://gilibowipasumew.weebly.com/uploads/1/3/4/5/134578686/texapulife-muvetupubivex-womiwatitupilij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fb6948e-fc49-4d88-9738-5d7697be49e9/tirazuzumutudar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b88e49-b77e-48eb-a609-ed6ccc2f5a2e/jalubaworodadotukulunaku.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/the_docker_book_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/dell_latitude_d630_factory_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/25352134748.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/ge_profile_harmony_washer_repair_manual.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_off0000aee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE6 5280 bytes
SHA-256: ec192ffb7275dc03c8c4f4959b62735529b6029715f40ae94da0d4286d3c188d
font_01_sfnt_off0000c0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D3 9556 bytes
SHA-256: 420bd1c645642ec7e90e446a3c030e27bb63e30f2bff41a1f4a15fac9bcf63a3