Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9e07504bc6c85d…

MALICIOUS

PDF

70.3 KB Created: 2021-02-21 04:05:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9e8ac8f7fe88954b21185f6bb578591d SHA-1: f1322faaa0b26721d6f76740a9ec32ae2e6bb773 SHA-256: 2c9e07504bc6c85d0f85c5a6b36e59e0e58f6f4dddc93e693b43d26f06ddc1e5
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://yafferge.ru/wb?keyword=how%20to%20write%20a%20visual%20argument%20essay In PDF document text
    • https://cdn-cms.f-static.net/uploads/4453144/normal_5fd183331ff09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426822/normal_5fe196741e669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465392/normal_5feb8e1a37b02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462345/normal_5ff48a3185111.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458615/normal_5ff81a33c6ef9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455176/normal_5fdefe12438a1.pdfIn PDF document text
    • http://bevatijiwavefad.22web.org/xibagegulekutovol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496225/normal_5fc826247fa45.pdfIn PDF document text
    • http://santand-es.com/658776385xeizs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468827/normal_6029e9126862d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451227/normal_6019296a653e0.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/zupenafud/44506463752.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/7311572912.pdfIn PDF document text
    • http://notufexunu.rf.gd/factoring_polynomials_practice_worksheet.pdfIn PDF document text
    • http://nomapalugaji.epizy.com/vesorubagiporesapegi.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_off0000d786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD786 5220 bytes
SHA-256: d644faa56674ef93186c165e0f5d6a0b0b6c04db9876cd5110a29a17a959c49b
font_01_sfnt_off0000e94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94D 10236 bytes
SHA-256: f0f618686c3805756cda12036c1e75ba9581e335d39f0d95147f2b2cc8775c2d