Malicious PDF — malware analysis report

Static analysis result for SHA-256 da6b82819ec70dcd…

MALICIOUS

PDF

35.1 KB Created: 2020-11-05 15:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: bf048c00e84ff3f7dbd0d924d687de3a SHA-1: 71791101cdf91c471166b2a11fd1ea58f63fdc9b SHA-256: da6b82819ec70dcd170e9dd330e0528fb9d3acc6064e6528bd258f349d9ab90f
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://traffine.ru/aws?keyword=star+warfare+hacked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_5f9c4349609f4.pdfIn PDF document text
    • https://lipitedo.weebly.com/uploads/1/3/4/3/134380968/bdc47e2d8.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/35812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f95b9bfb9149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f8af660f3db6.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/virokuzuvozixu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f8c70d339026.pdfIn PDF document text
    • https://guratebiliwabop.weebly.com/uploads/1/3/2/6/132682790/0db84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_5f9f9c886068f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451755/normal_5fa1a1b69c2f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416791/normal_5fa0ddc65c985.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/a6e3427f-023e-484d-a75b-ebb36c12112e/detefevuwiteja.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_off00004a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A7F 5160 bytes
SHA-256: 498f4ed0915a6153e13a27f2601f679c5e27404d9ae81eedc46470691b6ccbf3
font_01_sfnt_off00005c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1B 10924 bytes
SHA-256: 04de77698cee2948b49a46aab05dd4c5c1211f12479a52050a588337fa29267c