Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fb48ea739f56197…

MALICIOUS

PDF

76.1 KB Created: 2021-01-27 12:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 469e2e34ce8836cd04ba35fd4907c1c2 SHA-1: 26e182abfec70778ca922569e69bde4a4d99ccc4 SHA-256: 4fb48ea739f56197802713cc4fc7eb8993d69958c22030ed24385477ab25a389
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the overall structure strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://bologen.ru/aws?utm_term=ethyl+chloroformate+reaction+with+acid PDF link annotation
    • http://pristav.pro/62005375645o2bxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374853/normal_5fcb28c9ed7c8.pdfIn PDF document text
    • http://jewlgems.com/headmasters_barber_shop_county_galwayme40p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493221/normal_5fc7c28e409b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487888/normal_5fecec1221e2c.pdfIn PDF document text
    • https://zubisixoligifi.weebly.com/uploads/1/3/4/4/134479514/valipadofazemogopeba.pdfIn PDF document text
    • http://gebatuvarak.66ghz.com/so_sad_status_whatsapp_video.pdfIn PDF document text
    • https://gasimela.weebly.com/uploads/1/3/1/3/131398285/db8613.pdfIn PDF document text
    • https://tebukebodo.weebly.com/uploads/1/3/1/3/131381901/vifalev.pdfIn PDF document text
    • https://migobagola.weebly.com/uploads/1/3/4/8/134874333/9350165.pdfIn PDF document text
    • https://tololomajaju.weebly.com/uploads/1/3/4/4/134472688/53d926214.pdfIn PDF document text
    • http://money-team.site/50_nuances_de_greykucwm.pdfIn PDF document text
    • https://lewozokor.weebly.com/uploads/1/3/5/4/135400983/ruxojizatupedibefifa.pdfIn PDF document text
    • https://dalibigexewekef.weebly.com/uploads/1/3/2/7/132712129/niwigoregifitu.pdfIn PDF document text
    • http://piredvizhnik.com/bufegokipimelesawudutt2fm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xibiwoziveva.epizy.com/jotupo.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_off0000ea2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2E 5236 bytes
SHA-256: 3d2aec8af8fd49b3d3501deb80467430bcefe74dff9969102b0d40e1025c0e3d
font_01_sfnt_off0000fbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEE 11468 bytes
SHA-256: 34c0a3472b7820d313b330ce48efc4af2d84d72de563d2cf451037500a03d9f0

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