Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c8eb75b21b8b61…

MALICIOUS

PDF

34.4 KB Created: 2020-10-04 19:35:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 475752d54cffc44599745aaeed795205 SHA-1: 74aec18451b82b2bc389a447fc737ce7d80d814c SHA-256: c3c8eb75b21b8b61766d06788d509b070bff1847558c5b6761d8a51725574afc
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://gettraff.ru/strik?keyword=puntos+de+partida+9th+edition+pdf+download In PDF document text
    • http://files.thetepeetribe.com/uploads/1/3/2/3/132303082/f38fe7b11.pdfIn PDF document text
    • http://basot.oceanviewpatriots.com/uploads/1/3/2/7/132710677/5406fdf3bb0.pdfIn PDF document text
    • http://files.tncommunitycorrections.org/uploads/1/3/1/4/131437689/xemikagowu.pdfIn PDF document text
    • http://xosope.kookaburrahotel.com.au/uploads/1/3/2/6/132681237/6720899.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/6af14705-51a1-4e2a-b9b5-e3a48803f274/bewelenozamajarowopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bda5a1f-8965-40ab-a3ca-755391c597bb/newarabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50d5479c-c0b6-4696-93d1-bb5a62914e59/23394990964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf38875-279d-4710-96e8-f59ef765a1a3/ramadusavesorusoketotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3967/7861/files/richard_rohr_enneagram_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4306/9858/files/juwapolazud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/mutovixalaxixukakodavab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9493/8271/files/links_awakening_dx_level_7_walkthrough.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf3008df-d0f9-46ad-831e-b768c06c6069/93571779108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5038b06-01d0-4611-8479-eaa9cbeab9cb/92693953086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3d9a910-8b75-478e-97cf-0fb678b125a1/39998845015.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_off00004361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4361 5380 bytes
SHA-256: e1a6439a5d70f179161238e4ce9b59b95e8acff0065ee081abecce90c43d8768
font_01_sfnt_off000055b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55B4 12248 bytes
SHA-256: 1d5192058a0ea599041a3165c334d1b4f076303900e0f53cf96b569bbbf6300d