Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d1e1595b99c9fc…

MALICIOUS

PDF

40.5 KB Created: 2020-10-15 21:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 734cec42f52b739676ea2fe593dad9af SHA-1: eb551a607ebe3b2e54646fdffc34abc98ca9ec2c SHA-256: d8d1e1595b99c9fc0f302dcb7be0129ba484955c3e794ec3bcfbdb39aa187121
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://gettraff.ru/123?keyword=pmbok+6+edi%25C3%25A7%25C3%25A3o+portugues+pdf+download+gratis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f8858e4d449f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f874705532d4.pdfIn PDF document text
    • https://welofubevi.weebly.com/uploads/1/3/1/8/131856084/2425802.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/e9ff54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f870fa7cb40d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f87cf1981486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f86feb832c2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f87d79aa2d79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f8734e7213fa.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/ab2220c9-efbe-4946-8ded-83321f5ae60e/nesijejujijobuxawuwef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95d3da2-fdb5-4bcf-aaf4-dc11511b5bb9/54507082103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26db1b0-99d5-4116-9339-3485c15203e4/76773819801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6e9819d-85c7-4cd6-807b-00aada8261ed/zowenowikulirarogasiwaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9d0f73b-1b3e-4203-a362-65e1a33d8e43/21491281470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f85a99-dcd0-49fc-b9e2-3108953d5521/bemurifojogudawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/733c3991-613d-4d7f-9592-527cd3fdb9b5/66569145326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4fef295-d7e7-4560-bb4f-c048bce13372/develogomoxifotifimemik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6529/4504/files/pps_score_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6688/8870/files/40921546658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9793/9861/files/fern_charlottes_web_costume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/98311611632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0726/1341/files/54606714189.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_off000058ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58FF 6312 bytes
SHA-256: 8bb9a4ed830395eef6a81035bb532874ba5cd50def4137c431d4c3d32f1ab4ad
font_01_sfnt_off00006dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDE 10864 bytes
SHA-256: 4e88f26c7c223c671cbd6f3e67b462b1365770e51107c7b3e031bcf38a6cac09

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