Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2e2d424d78a191…

MALICIOUS

PDF

66.8 KB Created: 2021-03-01 10:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8dde8b0b46c6e0e822ce64325c1acc5a SHA-1: 733c44c88ec2e1a7b9a7552f5023966b49e9cfcd SHA-256: bd2e2d424d78a1916cf759419a0a50a012220382565bf33d13441b798810bbf7
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 operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure for a free PDF download, which is a common tactic for distributing malware or leading users to phishing sites.

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://jumiwimov.ru/strik?utm_term=sapo+y+sepo+inseparables+completo+pdf+gratis PDF link annotation
    • https://gibejeki.weebly.com/uploads/1/3/1/4/131438187/zebukeluk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5fe9aa59782b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_60274a5d73bce.pdfIn PDF document text
    • https://sufosuzupunu.weebly.com/uploads/1/3/1/3/131379650/radura.pdfIn PDF document text
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/a061ec131a.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/37749781776.pdfIn PDF document text
    • https://wuzezabor.weebly.com/uploads/1/3/1/4/131438899/5986916.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/wd_my_cloud_ex2_firmware_update.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_602f1d5862cdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_60121896b6fca.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/d92fbfb.pdfIn PDF document text
    • https://datokusowijodo.weebly.com/uploads/1/3/0/7/130776434/zulewete.pdfIn PDF document text
    • https://kaxesudinebeg.weebly.com/uploads/1/3/1/3/131379803/rivomis.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/82752057133.pdfIn PDF document text
    • https://nevomunetis.weebly.com/uploads/1/3/0/7/130740414/debagakisom-fukifisepur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403410/normal_600699b146020.pdfIn PDF document text
    • https://derigogo.weebly.com/uploads/1/3/4/0/134017063/zovevojij.pdfIn PDF document text
    • https://nixawajumumija.weebly.com/uploads/1/3/4/3/134338940/nubuvutise-figemufilesaj-pemive.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_602c48f80c6fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xomapagovujux.atwebpages.com/dgfc.basica.sep.gob.mx_aprendizajes_clave_curso_en_linea_2020.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_off0000c3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F7 5820 bytes
SHA-256: 0cc8e6cdbadb4d53711cb8c45dad6c0601948c581e1e11ffaf2f0dfa0e7d9445
font_01_sfnt_off0000d7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B8 11024 bytes
SHA-256: b2ab7447f1917be67cb05c0109d03f076aced7fe06e6b17a1a461ab941cb0c77

Open this report in the interactive analyzer, or submit your own file for analysis.