Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc39f727777978d…

MALICIOUS

PDF

63.3 KB Created: 2021-02-05 16:23:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e2a0eb4f9cbdff346bf4e0de12ff1c1d SHA-1: 2b2c5a386ad769bdf1f2b79848d4e49188daa7bf SHA-256: 6cc39f727777978d7df3f52036c94d40fb56771074c75b7bf1a358b2c6b60a3c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/wb?keyword=anti%20social%20behaviour%20report%20to%20police In PDF document text
    • https://static.s123-cdn-static.com/uploads/4425910/normal_5ffab94a85340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453144/normal_6017321a4ce74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481154/normal_6012811a2c84f.pdfIn PDF document text
    • http://bhd-management.space/kuzamejehpcv.pdfIn PDF document text
    • http://pubgucbayim.com/free_gems_clash_of_clans_2019_no_verificationju5uz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405202/normal_5fc62f6db4866.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393019/normal_5ff96bc076b67.pdfIn PDF document text
    • http://sokfresh.fun/pafofakenizirujuwurimenly7a.pdfIn PDF document text
    • http://filmera.ru/28499517465lt2g.pdfIn PDF document text
    • http://zuvels.xyz/pajitirajisamotikatinusag6cpc.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/tanapilamaxi/virulexaza.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/dna_and_genes_worksheet_11._1.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/47355440998.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/wesemufukud.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/29104995239.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_off0000bbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC4 5208 bytes
SHA-256: 6c9fd05184fbfa6ab5c369106b9b952911d8f03476f4c31fa6a57eb9821a9e02
font_01_sfnt_off0000cd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7A 10128 bytes
SHA-256: c620b0cd8d239f1732eed8007a67857eaacf97badc60b7407eec29d4632d5dd4