Malicious PDF — malware analysis report

Static analysis result for SHA-256 512873b9dd210f03…

MALICIOUS

PDF

49.4 KB Created: 2020-11-06 03:59:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 843e9172ba1e1dd3e8d1d04a84294ca5 SHA-1: 931912f169a88d5baefa994eaecdf10c67dfcbd8 SHA-256: 512873b9dd210f033ee7d8e1650124c347286cc511c39d30a381c05d70064279
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=things+that+start+with+u+preschool PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418963/normal_5f9ba91f063ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443799/normal_5fa032617f081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_5f92ddc4e7a6c.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/9ae3e81d-d62e-4b00-817a-7fa1dd9ad8da/.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/84123765138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a234fd-312d-4d51-91f7-ce814171b5b1/lisilevikelidudutaf.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/donkey_kong_unblocked_games_76.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/encase_forensic_training_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de8a0e38-204d-404d-b2b5-5790fc464e3c/dopofijuwopipupasobipem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39715b15-0fb1-4f02-b99f-b37cf56bb6b1/32298211343.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/ultimate_mortal_kombat_trilogy.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_off00007c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C6D 5236 bytes
SHA-256: e2b5d157484980bb43aa6ce6a22a0d991bdfd7cb8dc6f0f07620c978cd0fed6c
font_01_sfnt_off00008e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E50 13024 bytes
SHA-256: 9d2baefafe79429602ae0205b2ff584c63116a790bd49f6cb61915a85781ad80