Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3d48525cd9f9f5…

MALICIOUS

PDF

72.8 KB Created: 2020-12-10 17:55:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6a18c23ce8b0076cd1706e4ad9ae37f0 SHA-1: 9791a53421c8f5fd31d402a509ee7eba3587dd76 SHA-256: ee3d48525cd9f9f5042da7fe547c320ef4419a2e96b13d0687e030b522337ef1
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=nakama+2+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452199/normal_5fbf0abd0e257.pdfIn PDF document text
    • https://tesokumerapaj.weebly.com/uploads/1/3/4/5/134522001/bugajofosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379230/normal_5f8c8040b50b6.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/tuwopatuwenijadifib.pdfIn PDF document text
    • https://kubazavazagemu.weebly.com/uploads/1/3/4/4/134464578/5268104.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/mivawarezin_pemupib_bimugozutudufib_kadesode.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/zetare/administration_publique_definition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce1866190b057dd37e3170/t/5fd1a46fce71ee580fa79ae8/1607574640819/62656161448.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a954239b0722913c9654/t/5fc89d60d6e0cc37e34128a5/1606983008652/ludo_king_online_facebook.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e70d1452f90b7fe56088/t/5fc77b581d106d256bc46fcf/1606908760963/36015325187.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c991c6d9645836219624/t/5fc18c359b1ed0353816ae6a/1606519862314/91135640150.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_off0000c43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC43E 7148 bytes
SHA-256: c413040a3eeaf08a63910aaf2b20e76e4af912a888181410a19c507fc7e168e1
font_01_sfnt_off0000dc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC98 5168 bytes
SHA-256: 4a4bc7ce913089cba5641b36739d97814e1e059f7b1a0df1af88a393cab85c27
font_02_sfnt_off0000ee48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE48 11428 bytes
SHA-256: 1b3c563affbf0667e58f3815683ba4fdfb1b9a23d09a1144a4746d49c6ccd0c2

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