Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea24d97acc8a1e47…

MALICIOUS

PDF

71.8 KB Created: 2020-12-18 17:14:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b68af92b632d7849490c07d94b813e27 SHA-1: 593daa86638e20c1353f2a4a947ca553881b628b SHA-256: ea24d97acc8a1e47237f6e625028cb87c35b248acb4997781ab8f5de8602194c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to benign resources, but at least one, 'https://traffset.ru/strik?utm_term=lewes+fishing+reports+delaware', is flagged as unknown and is likely part of a link farm designed to distribute malware or phish users. The presence of PDF_SEO_LINK_FARM heuristic further supports this, indicating a mass of external PDF links generated for SEO purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffset.ru/strik?utm_term=lewes+fishing+reports+delaware PDF link annotation
    • https://rimususoku.weebly.com/uploads/1/3/4/5/134587725/farit.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/pusawebimozop-jelimelali-timazekazaz.pdfIn PDF document text
    • https://jipemovikeral.weebly.com/uploads/1/3/4/0/134012889/riroxijesig-mawamisifomukel-mipenaz.pdfIn PDF document text
    • https://liletalezawo.weebly.com/uploads/1/3/4/5/134591830/4400332.pdfIn PDF document text
    • https://malalufapavi.weebly.com/uploads/1/3/4/4/134481779/boxozale.pdfIn PDF document text
    • https://tirigimufaregi.weebly.com/uploads/1/3/4/4/134464067/e516fada91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pasawe/alphabet_recognition_worksheets_for_nursery.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/vegoratorozufu.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/ambarisha_kannada_film_song.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/78519247733.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/24100122164.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/78235045789.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7D 5124 bytes
SHA-256: d9e3593d2c1e7ea0243101d91aa960525b63019c86722019b51760698a1aee71
font_01_sfnt_off0000dfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE5 10688 bytes
SHA-256: 700c4f5a7b8df93601a6c4c9dee5a6e8bbbe82f23e8c1a6dc2bf5bc8add0099a
font_02_sfnt_off0001040b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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