Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb09624ca2e8a28…

MALICIOUS

PDF

66.1 KB Created: 2021-02-24 23:17:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3b0ed958aa5518b2437f5780ee92c49a SHA-1: 811f4a8323717dd690a46174ec4783b6a66e0ff1 SHA-256: 3fb09624ca2e8a2820844579992286f184bb9d50e477ebc887662b26a3353f44
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

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://seumenha.ru/wb?keyword=etq%20in1800i%20generator%20parts PDF link annotation
    • http://jijegak.22web.org/murude.pdfIn PDF document text
    • https://koropiliful.weebly.com/uploads/1/3/0/7/130740252/mesepitonoro-xesuro.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/reading_the_bible_in_120_days.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/dizetogi-sikikegarapirev-wiwivikijalega.pdfIn PDF document text
    • http://kuxalowakanuxed.iblogger.org/42139434635.pdfIn PDF document text
    • http://kuzamejeluwezik.22web.org/gimorajozulijugipebemubun.pdfIn PDF document text
    • https://rijifupipi.weebly.com/uploads/1/3/1/4/131453414/953acd414d.pdfIn PDF document text
    • http://donumoraf.iblogger.org/56125719739.pdfIn PDF document text
    • http://ladowijujeto.iblogger.org/1889235118.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/wakurufakekiror_nilav_raduzizuwukomin_tivibu.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/how_to_become_a_computer_architect.pdfIn PDF document text
    • https://xemegejimeje.weebly.com/uploads/1/3/1/6/131636808/e52e5b89e06338b.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/jupudizadid/bundelkhand_university_jhansi_phd_form.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/guxataveduremuvikux.pdfIn PDF document text
    • http://mubidixosi.epizy.com/feasibility_report_on_fish_farming.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/chandrayaan_2_information_marathi.pdfIn PDF document text
    • http://wokixewo.epizy.com/27702500271.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_off0000c774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC774 5424 bytes
SHA-256: f0efdfc28a46bf423685a7c320184fe86474fbd8fc5d708c3d3926a7f516c20f
font_01_sfnt_off0000d9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FF 9840 bytes
SHA-256: e0baef8a28ad35bb4de519cbf4a772a1ea91a3bfeba1795d06484603f69b6422

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