Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8edc7db103e6fbf…

MALICIOUS

PDF

96.1 KB Created: 2020-12-17 16:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b262723d4ed6bfda2464c4658950522b SHA-1: 682f686a86add04b89aa36201d2cb679b634e3a0 SHA-256: c8edc7db103e6fbfcafe586e616eca1b7e3e0024ea11cced62f3094d8a286b2e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/strik?utm_term=gre+issue+essay+format PDF link annotation
    • https://ridawixesij.weebly.com/uploads/1/3/4/6/134660161/ae3cb70016ce01b.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/081d687a-4717-4ecf-917d-2de800167232/pathfinder_transformative_weapon.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/82564562315.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/vagefogakopixejobuze.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/nifixewetakisof.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/madison_county_fair_madison_ne.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0187aa5bc066edfa15e28/t/5fc12a60f3de5e49b58e4f12/1606494816976/50277239463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/213f14ac-1a3d-4258-8d03-2de309050cfa/old_age_sticks_ee_cummings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec48f3d-787d-464e-82de-4002534ed948/26910412286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b39ecb69-1722-4a31-9db1-35dcea053f57/22223095521.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc586961c8c741314515584/t/5fd6472fdca22152603e0043/1607878447961/institute_for_fiscal_studies_brexit_report.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_off00014033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14033 5016 bytes
SHA-256: ae5e3ea62f51967280370085c5e12bb03a2898e03f1a68c975c81634d52bad53
font_01_sfnt_off0001513c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1513C 10156 bytes
SHA-256: 7c0e5339bf32525a3fb67b8c62893aced05e9e83f46b3740e61b3aa24043afd1

Open this report in the interactive analyzer, or submit your own file for analysis.