Malicious PDF — malware analysis report

Static analysis result for SHA-256 930ce860c5ffd7d9…

MALICIOUS

PDF

77.1 KB Created: 2021-02-28 21:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b5e8bfdd81dc5a964c7fd439f8d4c813 SHA-1: 1ecf3e25fee97032f032d5eae5462881926ad490 SHA-256: 930ce860c5ffd7d91294aaf9067f0b07584ca5139343877f091d52b3ff8af325
156 Risk Score

Malware Insights

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

The file is a PDF containing numerous external links, many of which point to suspicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers flagged it as malicious, specifically as a phishing trojan. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=how+to+regenerate+kenmore+water+softener PDF link annotation
    • http://varnisvakq.ru/cygolite_hotshot_100_manualnrdwo.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/bituwonef.pdfIn PDF document text
    • https://sozagigojo.weebly.com/uploads/1/3/1/4/131454883/a03e414.pdfIn PDF document text
    • http://jokidinavefo.22web.org/bratislava_tourist_information_office.pdfIn PDF document text
    • https://dujolisinapujis.weebly.com/uploads/1/3/4/3/134328324/borenojawatedupedub.pdfIn PDF document text
    • http://fitokapss.xyz/jimmy_choo_shoe_sizing_guide81a3g.pdfIn PDF document text
    • https://pasorizafam.weebly.com/uploads/1/3/4/0/134096756/bowimajor_supupewis_rorakukefuwi_nivisu.pdfIn PDF document text
    • https://betamomaj.weebly.com/uploads/1/3/2/6/132695924/7610348.pdfIn PDF document text
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/7349865.pdfIn PDF document text
    • http://navalny.design/93503507458ftk2x.pdfIn PDF document text
    • http://bluebadgeform.com/el_dificil_arte_de_amar_pelicula_completahys4q.pdfIn PDF document text
    • http://xewuxufulizifu.22web.org/gesikef.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/jezekemunidup/sponsorship_approval_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/61802358205.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/48311307679.pdfIn PDF document text
    • http://ligirewela.epizy.com/is_evening_primrose_oil_ok_during_pregnancy.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/6029483764.pdfIn PDF document text
    • http://mulezajite.rf.gd/software_documentation_template.pdfIn PDF document text
    • http://lirinuguwe.rf.gd/94381123021.pdfIn PDF document text
    • http://vuduluxepo.epizy.com/d_link_dap_1522_login.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/sample_application_form_indian_passport_renewal.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_off0000f100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 5172 bytes
SHA-256: fe4e9b264805dde2a418a577b736bf0a93035d65b6be6ea8690bc0f8408fda51
font_01_sfnt_off0001029a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029A 10540 bytes
SHA-256: a9321cd51fa9b405672d07e6643a2253231ca66771245d2a9970f51292518d4d

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