Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb39db67b85d5cb0…

MALICIOUS

PDF

66.5 KB Created: 2020-11-09 20:56:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: d4761b8e7ca6dfb6be59288c8734958e SHA-1: 90e83817ee86273f6ee75153e5f6546e19988923 SHA-256: eb39db67b85d5cb0f77d02703162c57e2df28c75dad121d6d8432cee566f77f3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=dictionary+definition+of+attitude In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379489/normal_5f9375bf0fee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f8eb6508adc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f8dd941bd740.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zidenigad/oceans_11_planning_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0bcde52-e322-4096-961b-9185783a4a4a/1901620600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7b7d12-23c6-4ce2-a1c6-1645cc0d7742/6534976571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb0470c1-f3d6-40c2-b09a-d09b6558da46/panosonifisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0d5215e-559c-4824-9c6d-f6cd96cc86d5/backyard_baseball_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d8db10-c556-4134-a0aa-f21d013f5a2d/nulomedebulafapubol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/200d0576-79dd-4a44-8e0b-cabff153611e/72495023144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1dd3d2e-7fec-4c35-b6d4-d6c9018bf956/83836168401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e064e98-108d-4a7d-b966-3efd4eb98580/jiziru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a8fc60-1c5d-466b-b46c-787180c915a8/lofinufidobul.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_off0000c80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80F 4908 bytes
SHA-256: 526a446a4789f1e922add02883fa641966a8f1e2a94be514fd64419dc3d22dbf
font_01_sfnt_off0000d8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E2 10972 bytes
SHA-256: b0c4e46e3a54ed280c824a0831788636697d0712d6e0723cf2473c16524d7ae3