Malicious PDF — malware analysis report

Static analysis result for SHA-256 e41fd596fa322f95…

MALICIOUS

PDF

71.1 KB Created: 2020-11-17 00:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ce437554992f54a1e8f7e1a71142d872 SHA-1: a25e2b278e7823c9b15d7b8d57512c5b3a406a8c SHA-256: e41fd596fa322f9532b202f6ccf12f70f98400966b390bf9e1f047737e86d808
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=schipperke+for+sale+missouri In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5f90b014330ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_5f8bffe124930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492588/normal_5faf8526e2240.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/724d374d-c2de-497b-b5e3-3cd81c692698/air_fryer_garlic_bread_keto.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/watch_underwater_2020_on_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/fayju_amazing_frog_android.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/subject_verb_agreement_worksheets_for_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/zobagawopozali.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/optic_gaming_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b154ee9-4343-4aee-b156-8f12d79359b4/97231870371.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_off0000cf77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF77 5424 bytes
SHA-256: 7a045866a4e02ae21921c3f7893e7ba420d7bd1ccf4f294266cda9e7361515d3
font_01_sfnt_off0000e1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C4 14908 bytes
SHA-256: 0bbc14f172b0140442f133dde1c304001e0a042736ff902903fbaea6a8f2cfb6