Malicious PDF — malware analysis report

Static analysis result for SHA-256 02051b352a5f0aa5…

MALICIOUS

PDF

75.7 KB Created: 2021-05-18 15:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 4642bb8a50b3262200750f24e379f1da SHA-1: 6174d96ff50ffb8cf7d767ce9dc3b250f3f88757 SHA-256: 02051b352a5f0aa5e40d571dcccf3b4d7d2a225efb01d8b233e5495f2687b419
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were extracted, the structure and URL patterns suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://tirugisig.weebly.com/uploads/1/3/0/7/130738706/didagore.pdf In PDF document text
    • https://rixadoliwuri.weebly.com/uploads/1/3/1/4/131437780/zotozufinib_zenawibexavawe_vejuwo_duzov.pdfIn PDF document text
    • https://lumabejisojexu.weebly.com/uploads/1/3/1/4/131455378/1b0648672b3.pdfIn PDF document text
    • https://fanizoliboligom.weebly.com/uploads/1/3/1/0/131070566/9729021.pdfIn PDF document text
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/9069008.pdfIn PDF document text
    • https://rezomiwutamanap.weebly.com/uploads/1/3/4/3/134362688/paxuwi.pdfIn PDF document text
    • https://wixivowid.weebly.com/uploads/1/3/4/6/134689466/163cdaea50949.pdfIn PDF document text
    • https://wuxinaruniluxod.weebly.com/uploads/1/3/4/8/134882591/ranuzajigopujikunem.pdfIn PDF document text
    • https://lamixanusagexog.weebly.com/uploads/1/3/5/3/135317293/zuvizuregavalubojog.pdfIn PDF document text
    • https://gulufoge.weebly.com/uploads/1/3/0/7/130776817/6717866.pdfIn PDF document text
    • https://zemijawa.weebly.com/uploads/1/3/1/0/131070152/594015.pdfIn PDF document text
    • https://vufobuvi.weebly.com/uploads/1/3/1/1/131163959/9072f8b109.pdfIn PDF document text
    • https://dokosoberodato.weebly.com/uploads/1/3/4/5/134597138/15525.pdfIn PDF document text
    • https://wugowimuvup.weebly.com/uploads/1/3/4/7/134762233/sureraxasug_nasedatarezovur.pdfIn PDF document text
    • https://gogujezirud.weebly.com/uploads/1/3/4/6/134655685/pireroga.pdfIn PDF document text
    • https://rabiwibunefa.weebly.com/uploads/1/3/4/7/134747284/bfe73c00b5e.pdfIn PDF document text
    • http://silozimerum.iblogger.org/58139213510.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bQ3nTxENlgE/wb?keyword=dragon%20bookstore%20las%20vegasPDF link annotation
    • http://niwuzowebod.epizy.com/hawaiian_party_template_invitations.pdfIn PDF document text
    • http://fofilelajisemap.rf.gd/78499241877.pdfIn PDF document text
    • http://serumisa.epizy.com/43864730355.pdfIn PDF document text
    • http://vejuzaxifokifo.rf.gd/72047187519.pdfIn PDF document text
    • http://dexexofavigemil.epizy.com/golasazonuge.pdfIn PDF document text
    • http://legizoro.epizy.com/19535524301.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_off0000e9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F8 5116 bytes
SHA-256: d2b9c66037fa6bcb7019709d66c3b6a29ee347eb030dd9f203c459f89aa993de
font_01_sfnt_off0000fb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7E 10632 bytes
SHA-256: fc95d8abb4cb08920935412ac132c7fd26b84cea5a29137bf8da0d23999d09fc

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