Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14f7808dd98791a…

MALICIOUS

PDF

71.4 KB Created: 2020-12-20 10:20:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 83c337beba4e24800671fec32c038079 SHA-1: 1c3a6aebc8f3ef1a74e45229020c25bf74492971 SHA-256: c14f7808dd98791a7c8af7029a7500afc270f4afe5cb0d37e189e49f8a0b7b64
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure. The document also includes a heuristic indicating it's a password-protected archive lure, suggesting it's designed to trick users into downloading a password-protected payload. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffmen.ru/strik?utm_term=unblocked+games+at+school+2016 In PDF document text
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/xesixivuva_weralupidile.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/xajov_gatixukiz_sudilutubusax_gagib.pdfIn PDF document text
    • https://gixapogaruxa.weebly.com/uploads/1/3/4/3/134331356/tidumoneriluza.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/9ca11427-59b3-499b-988c-921bf7465c9b/sisazubexojex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85344fab-f108-4329-9273-548e62ddacea/gumuvejuleraginugiruteg.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/crystal_reports_for_visual_studio_2008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a77258f9-ec97-4c60-b863-1dc9a059785a/17270126387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19734959-cf42-4c26-ba8d-741d705bee6a/35893451081.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfeb102bbd74065800e14d/t/5fc118394f98375720066373/1606490169183/free_rewards_for_students.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_off0000d76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76A 5932 bytes
SHA-256: 91fb4367eaa808dfa3c862e9d71fd722302357ca862dad123ba52a705fabbc1e
font_01_sfnt_off0000eb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7E 11572 bytes
SHA-256: ed9a9032801b5dd81bea32dc7c84619a4bcfb2892b2da5f99d773fe5faa84972

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