Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20dc2b33396abcb…

MALICIOUS

PDF

71.8 KB Created: 2021-02-23 20:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 73d86ecac8a2015432f55f3d00570baa SHA-1: 5762e82c42d17a59787d26c6e91c5f867a4ef15e SHA-256: e20dc2b33396abcbbb9d1f05817ffeb0a9e79cf4fb58ec0ade6608a6d56b5126
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/wix?keyword=the+urbz+sims+in+the+city+ps2 In PDF document text
    • https://wakejowedab.weebly.com/uploads/1/3/4/5/134599651/5956765.pdfIn PDF document text
    • http://olivamebel.com/winujomosemalanukeb3biir.pdfIn PDF document text
    • http://sweetmeet.online/wugejanaduftccmu.pdfIn PDF document text
    • https://kubazavazagemu.weebly.com/uploads/1/3/4/4/134464578/8173f1926ba2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489717/normal_60343a52443c4.pdfIn PDF document text
    • https://jibokogemi.weebly.com/uploads/1/3/4/7/134767321/941ca6.pdfIn PDF document text
    • http://regvoolkim.website/mastering_chemistry_answersqwv4o.pdfIn PDF document text
    • https://tuwunofibe.weebly.com/uploads/1/3/4/6/134657164/865b925f675a6.pdfIn PDF document text
    • https://buvapubadoloj.weebly.com/uploads/1/3/4/2/134265521/0cf67d9d60.pdfIn PDF document text
    • https://molemopiwe.weebly.com/uploads/1/3/1/8/131856052/kurilo_judir_ligupozafeno_faredif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/purufiz/jomazoxivejoxolaberaru.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/nutritional_information_three_bean_salad.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/calculus_ab_limits_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/dejal.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_off0000dd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6A 5304 bytes
SHA-256: 07ab8ff861f446fc4ccffcdee2ef3b5f234e8d8e70722d6374c952da38fd699e
font_01_sfnt_off0000ef5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5A 10264 bytes
SHA-256: a391ea076d7a9dc7ecda2c0bde7c566a7a39264218f6a5da19ede3ce56bb63cd

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