Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07dfb8e2c0bddb6…

MALICIOUS

PDF

67.2 KB Created: 2020-11-11 18:20:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d2eec68cc90eec236e75f3079e79e89a SHA-1: 66501c10cae287736656e24993fe229ab7213555 SHA-256: f07dfb8e2c0bddb679a45b61a1c01fcc5207580a6d74add4eb9eff9c1c4e10c3
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=finn+and+bones+recipes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381730/normal_5faaa3183977c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_5f8df71cba7c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445745/normal_5fabbc22c3b14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411511/normal_5f97496da6c8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f86f9474acfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485014/normal_5faa3a24c756e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380068/normal_5f96bc4ce0687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382614/normal_5f94c807db01b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5f892e9980db4.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/605c5ca1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369501/normal_5fa528492da02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5f9652e5019eb.pdfIn PDF document text
    • https://jinezosibe.weebly.com/uploads/1/3/4/4/134454760/80bc14d50b536.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/44b0abb7-1457-4e00-94f5-d380d79d0020/64662085812.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/dubins_ekg.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/usatestprep_answers_key_math.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_off0000c923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC923 5128 bytes
SHA-256: 1b4db9101fd6979a1734d5600e0c4c841adf2580bfb9c0c9af7859917caa6f71
font_01_sfnt_off0000da98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA98 11528 bytes
SHA-256: d94e0a59252a17b6a88a209b996f7802f58a99b7c3d8388e4776e11f4d11efe7

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