Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d3ef4dfc7f53baa…

MALICIOUS

PDF

54.3 KB Created: 2020-11-09 05:44:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 63167197d5aadeeb9ef92b2e98fde180 SHA-1: c77a7dcfb93311e50d155a6d82fd6cc499f981ad SHA-256: 8d3ef4dfc7f53baa0dabe1782d5af31c4eb2da4ffd8ccc359f9ed10b2e0a0ff0
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://traffking.ru/123?keyword=roblox+quiz+diva+answers+2020 In PDF document text
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/2b600d1b99e.pdfIn PDF document text
    • https://zalirojojates.weebly.com/uploads/1/3/4/6/134606979/guwitoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f8b65729a99a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1b840fba-53c7-494e-92b9-8c3f6fb434b6/73749885102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/589d6f67-a9bc-4120-b9ee-d9b5e6b6cfbe/zomaverod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc04847-c1cd-4f78-aa4b-8ecef3ab51dc/symbicort_budesonide_formoterol_obat_apa.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/layla_candra_malik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d782036b-a5e5-4158-a471-2ef744c41bea/qualitative_observation_definition_biology.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/history_of_allelopathy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73477812-085a-46e2-9c50-fe1781dec8be/carvers_creek_state_park_sandhills_access_fayetteville_nc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6605df6-ce3a-4365-abeb-ea0425fd9f95/68010168367.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009586.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9586 23700 bytes
SHA-256: 4b2c7fa826a95a3a1c58fd7f54348168299437df4671fe45ab306c1f0aba46cb
font_00_sfnt_off00005d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D04 5436 bytes
SHA-256: 5d5174e05e2e5cd6a8601f8127ff144823a43a9102a07bfc01b3cbcb34fd013e
font_01_sfnt_off00006fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA0 11088 bytes
SHA-256: b7062f3b0d05214053dc2c1421538fc95b5d0995a12355dd4b93eba86930bbe6
font_03_sfnt_off0000be16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE16 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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