Malicious PDF — malware analysis report

Static analysis result for SHA-256 db1b22a43c278fb5…

MALICIOUS

PDF

48.1 KB Created: 2020-11-07 22:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 4cd9d5c4f30c2b32cf6ece2e95ae445a SHA-1: 1ee6046a7a01e6bad16e9b9cc7962ff0688df8ec SHA-256: db1b22a43c278fb535e9bf3f436634330d10234262d919a340324f5daa75b0f1
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/123?keyword=pbis+conference+2020+missouri PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f88f143d864b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_5f945c5f9256d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f99ca645de2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419645/normal_5f9b19c50e5c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371497/normal_5f9bc4728a643.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f9dd537ca1f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402478/normal_5f9854beefd7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f875cf93f819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393208/normal_5f972fdd2e77c.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/8c4918d3-ef2b-431c-91ed-27bbe587c557/35136062491.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/vapowedulemozenanunufeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87193240-7d6d-47e8-911c-6fb47a2508a9/jitifelolifitutowigabiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/kawapogexajewe.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/ba_english_thesis.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/carescape_r860_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/lonowezijuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/junovetodurefesabuzoje.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6645 5200 bytes
SHA-256: 0799ce99ef0b1a3509b9d3c48969425a32d42dabedba5f6e9fd3a83128584e36
font_01_sfnt_off000077e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E6 11192 bytes
SHA-256: e583bd883176bb89b35c2232523b14409250f14e36dc7fcb8218af46e7c288a2
font_02_sfnt_off00009e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E13 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c