Malicious PDF — malware analysis report

Static analysis result for SHA-256 31ffa79444d3dc5c…

MALICIOUS

PDF

69.6 KB Created: 2020-12-11 15:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ae28fa1c754ce7009b803389eb35d880 SHA-1: 369cd9df054d3958894f9eddad08531704e90e7a SHA-256: 31ffa79444d3dc5c3cadf80e3d3629e09499cd1465d34d72f2f8a8809ee330f7
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafficel.ru/wb?keyword=free%20creative%20art%20cv%20template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379053/normal_5f9382724e75a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_5f9b8781b407f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477163/normal_5fca805ce5056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480594/normal_5fbbe0d3e0351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_5faacc58cf972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8e712e84269.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f5f49f6f-9588-4ffc-8de4-82f74f4c5509/49615464891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8828f82e-8ac5-430b-a67f-0503b02b5bb1/smooth_muscle_excitation_contraction_coupling.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/71107286407.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/android_image_button_size.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdefd59d793648405385b0/1606283221584/48847813763.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC989 4488 bytes
SHA-256: 4b8f477a8458823de7aaa0a5861b30c48e47bde5c0bd855b39a49a36c9585551
font_01_sfnt_off0000d8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C1 10428 bytes
SHA-256: 0d26b0d0d0c20c1d1a0ff63c15e941632bdf0d149ab42277eeb27e9de24b5a94
font_02_sfnt_off0000fba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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