Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e5b803cd88baaa…

MALICIOUS

PDF

72.3 KB Created: 2020-12-28 03:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0093a3a8c0cc0726a1d169eb96c35e4b SHA-1: b363c0a1b5e8ad952f6e7ce23559bbcfe97b2944 SHA-256: e0e5b803cd88baaa6cedd61bcbedf8f51171e7c8750aa9891a35592d83643a56
214 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 and routes users through malicious redirector infrastructure. 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-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.
  • 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://cctraff.ru/strik?utm_term=dwight+howard+height+at+15 In PDF document text
    • https://cdn.sqhk.co/lodoseduler/RZFE6MC/eso_death_knight_leveling_build.pdfIn PDF document text
    • https://xowilululevala.weebly.com/uploads/1/3/4/0/134017879/b7cc1bbc511dd.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/928e7b54858bf.pdfIn PDF document text
    • https://cdn.sqhk.co/mejomusajob/heEhcK2/37164753956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f953ed1e84e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462379/normal_5fe50efca347e.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/dorobukasawituw/iowa_high_school_softball_state_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/rupowugebotenumadisojuwod.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/93842577742.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/9878186172.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/museni.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/87596541156.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_off0000e060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE060 5144 bytes
SHA-256: 1ab8651a09dc58bf9f7c6dc524fe64b1be0c922ae3abeb9f1325a30e8d52b85e
font_01_sfnt_off0000f1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F9 10184 bytes
SHA-256: 7e4745908d69d0e1fa8dc1c57217c87612e005cbace1db31bd3a80ac4dfcadf4

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