Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf7fc8e847120ee8…

MALICIOUS

PDF

46.7 KB Created: 2020-10-18 07:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: d9ff001cb3a474a64f2178f35ec987b9 SHA-1: 45b3daa885ba8cf130aa1f9825848d8294ee30f5 SHA-256: cf7fc8e847120ee8310dce4ae707a5140ec1181c70637814711e2c6af6cd4fca
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://ggtraff.ru/strik?keyword=capital+de+giro+pdf In PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/9041530.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/9611777.pdfIn PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/pukelemo_virujiwufob_wepop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367273/normal_5f87591467c45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f8713d01db2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5f89c6b1b1521.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/b4dfd889890b11.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/2207966.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/bibesekukemugedovofa.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/5424780.pdfIn PDF document text
    • https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/d5aa741f161b8.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/mamip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/themes_in_a_streetcar_named_desire_a_level.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/makusodupakazawez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4902/5188/files/1st_apk_pixel_gun_3d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7777/7061/files/71626296759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3f30621-ab52-4034-a92a-645c9bf4d1d7/85364510166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3ec92a-d787-42e4-a71d-ccc03f431649/tugavubumabajilezuruk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1277ef-eb3f-472c-ad6f-3979c03975f8/66953805543.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_off000078ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AC 4936 bytes
SHA-256: 3abe3b927e297c7f5af3d58d0670ac426740864bfecc8f193a93712ba9d4809a
font_01_sfnt_off00008988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8988 10724 bytes
SHA-256: 76cbec7a00c237f3d887d2ea59a657a1f76079e4b1eb11783fd0dd7b70c67020

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