Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1da1016ccd0352…

MALICIOUS

PDF

95.7 KB Created: 2021-03-15 23:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e6add760507c5d0cb1f88883847eb3be SHA-1: 421b0342c975898d39846dde5576f4d0e93625d5 SHA-256: 0e1da1016ccd035272f2df62a040792c6b1528c0471d3df6f90518d25272ad8d
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains, indicating a link farm or phishing campaign. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM strongly suggest this malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://soxebez.ru/123?utm_term=first+certificate+in+english+3+answer+key PDF link annotation
    • http://simagasavopajet.iblogger.org/78209486060.pdfIn PDF document text
    • http://xojanefod.mygamesonline.org/12192204288.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/e0305af115541b9.pdfIn PDF document text
    • https://bojebunu.weebly.com/uploads/1/3/0/7/130775379/5963083.pdfIn PDF document text
    • http://wipebodu.mypressonline.com/42149128255.pdfIn PDF document text
    • https://nonovobuzodeku.weebly.com/uploads/1/3/5/3/135348203/2a25736.pdfIn PDF document text
    • http://fopesekebamit.22web.org/wenokilagaxor.pdfIn PDF document text
    • https://warolola.weebly.com/uploads/1/3/4/6/134600536/4882751.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/kofasutizivotudadewuta.pdfIn PDF document text
    • https://rawixokuboja.weebly.com/uploads/1/3/4/0/134097397/vawuk.pdfIn PDF document text
    • https://nemamalalebu.weebly.com/uploads/1/3/4/3/134357173/5ae24e7461bd1a.pdfIn PDF document text
    • https://reropazorulofo.weebly.com/uploads/1/3/4/4/134437501/kariduritu.pdfIn PDF document text
    • http://nufogikije.22web.org/angsana_new_italic_font_free.pdfIn PDF document text
    • https://nodeseverew.weebly.com/uploads/1/3/5/3/135323512/bezugezamejojipugob.pdfIn PDF document text
    • http://pugezesiw.mygamesonline.org/antimicrobial_susceptibility_testing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_b75d7aff31e043d098b9efdc5ee79627.pdf?index=trueIn PDF document text
    • http://kopolug.myartsonline.com/16053247874.pdfIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_b63212eefb844f888dda50d9984b42f7.pdf?index=trueIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_82841f66915d4ae7963f28e4c24e7818.pdf?index=trueIn PDF document text
    • http://weridujesuta.epizy.com/steuererklrung_anlage_n_2014.pdfIn PDF document text
    • http://lejipuresip.rf.gd/wimodo.pdfIn PDF document text
    • http://xurosuforudev.atwebpages.com/metokejixi.pdfIn PDF document text
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_cf59d544a4bc40beaf705750f30c00a4.pdf?index=trueIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_b48f228ad12d414cbbd7cc10edfdbe28.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001293b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293B 5520 bytes
SHA-256: 75e3fa94ebefab4bb5af584f57409995b8ef9e677834d42fd70464d5a96e8c0a
font_01_sfnt_off00013c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C16 2232 bytes
SHA-256: 7edcec1dbc059d1e583af4d254e25e0feef50c810678138bd426408e750f40c7
font_02_sfnt_off000145bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145BC 14092 bytes
SHA-256: db74b88ebb425630e26aae4673badec71856f3c615359ea66f5c33bc9a1068e1