Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e828f8a7453bfd7…

MALICIOUS

PDF

101.2 KB Created: 2021-05-01 08:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9539f5225ce59addb9be6806df53629a SHA-1: 847f199fa8973fbe496f0e62d3b922134f2351de SHA-256: 1e828f8a7453bfd7271cfce1b79d0db8f64e7e729bdf2556c2be7757957ee281
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are likely used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/strik?utm_term=how+to+trade+price+action+reddit PDF link annotation
    • https://namazowofurap.weebly.com/uploads/1/3/4/3/134372349/df8f06e1b0354.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/why_is_my_air_conditioner_compressor_not_working_onxqh36.pdfIn PDF document text
    • https://kesozelakix.weebly.com/uploads/1/3/5/3/135300748/nowerabexevid.pdfIn PDF document text
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/376708891248984.pdfIn PDF document text
    • https://vewewiganivobob.weebly.com/uploads/1/3/4/8/134852084/joganuja.pdfIn PDF document text
    • http://powerpoint4you.ru/91119439724w87rb.pdfIn PDF document text
    • https://wojemalivameju.weebly.com/uploads/1/3/0/7/130775107/xigulejuzebazen.pdfIn PDF document text
    • http://8bitbeardsco.com/88132267856oe407.pdfIn PDF document text
    • https://laxuwipulave.weebly.com/uploads/1/3/5/9/135956831/8099933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412762/normal_604fbaf5404f3.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/stock_market_technical_analyst_job_descriptionvuyro.pdfIn PDF document text
    • http://erogan-columbia.site/hitachi_solfege_fridge_reviewdtvsj.pdfIn PDF document text
    • https://purelukanixavaj.weebly.com/uploads/1/3/1/4/131454065/doriru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412896/normal_5fe50fbce2926.pdfIn PDF document text
    • http://clobuss.ru/adare_wedana_karaokeir2lq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450141/normal_6061b2e04a22c.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/neviwove/muxoru.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/button_phone_java_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/cavernoma_and_chiari_malformation.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_off00014e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E68 4912 bytes
SHA-256: 437034682ccb9e95b8511428da77118d4d1696d0d3bfd412f9bb064b3a71f885
font_01_sfnt_off00015f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F39 12048 bytes
SHA-256: f9e5a98d8c1054ec2b9e3eb3593057f146387540c19a72d70a128ea0dac3c3f7

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