Malicious PDF — malware analysis report

Static analysis result for SHA-256 659547c68392637f…

MALICIOUS

PDF

72.2 KB Created: 2021-03-20 16:01:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02ee5796daf3095f9b7e3fb065cedc0c SHA-1: 669e0cc61ce33eb3ef1b654882d55baf46eb8b0d SHA-256: 659547c68392637f15e103e31faf6e1fd9c823316ec095c0abc02a0f5a4cab33
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external content. The primary URL, 'https://xajibur.ru/123?utm_term=jeepers+creepers+1+full+movie++hd', suggests a lure related to popular media to entice clicks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, many hosted on disposable domains, reinforcing the malicious intent of driving traffic to potentially harmful or deceptive sites. The ML classifier and ClamAV detection further confirm the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/123?utm_term=jeepers+creepers+1+full+movie++hd PDF link annotation
    • https://pexasojurez.weebly.com/uploads/1/3/1/3/131381046/tiwela.pdfIn PDF document text
    • https://sibevuguz.weebly.com/uploads/1/3/4/8/134859718/cfaa3d0286ea3d.pdfIn PDF document text
    • https://tipirigemiwar.weebly.com/uploads/1/3/4/0/134016889/b9d081c8.pdfIn PDF document text
    • https://kuvikupomudu.weebly.com/uploads/1/3/4/4/134457818/22c4c2b.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/doxatoxalat_wazujodedumulax.pdfIn PDF document text
    • https://vudivopaf.weebly.com/uploads/1/3/4/8/134876542/lewegukutuw_pomuf_wozedazumi.pdfIn PDF document text
    • http://cmb-accueil.com/nulomulodamozus209o1.pdfIn PDF document text
    • http://netekepipavosis.sportsontheweb.net/chemical_compounds_names_and_formulas.pdfIn PDF document text
    • https://jolovezenokomo.weebly.com/uploads/1/3/1/3/131398109/fikujole.pdfIn PDF document text
    • http://ighelpcenter.xyz/xekugasit5f5ie.pdfIn PDF document text
    • https://nojarotawufa.weebly.com/uploads/1/3/4/3/134313922/3620357.pdfIn PDF document text
    • https://dogixosewe.weebly.com/uploads/1/3/4/6/134633635/migibefe.pdfIn PDF document text
    • http://organicsss.space/surukutgw9by.pdfIn PDF document text
    • http://robinmani.site/2757815644835zzg.pdfIn PDF document text
    • http://rosativiwam.mypressonline.com/aristotle_happiness.pdfIn PDF document text
    • http://bu-markett.com/951826852954jpx4.pdfIn PDF document text
    • http://japarof.mywebcommunity.org/baba_black_sheep_poem.pdfIn PDF document text
    • http://livecopyrightverification.com/799367202191jn66.pdfIn PDF document text
    • http://reactivaperu-2020.com/power_system_analysis_hadi_saadat_3rnp9p7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedonefekipide.myartsonline.com/common_noun_worksheets_for_grade_1.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_deb6c9cbd65e42c3a3b7a6b5de35400b.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_ae97292562c644d6a776395306bd9f75.pdf?index=trueIn PDF document text
    • https://40fd9d30-e691-4ad4-9ff9-7de67b304886.filesusr.com/ugd/45b27a_c787436be6564c8fbffd32182cc5d3f9.pdf?index=trueIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_c9b2d210174a4795ae088e83dc3c8caa.pdf?index=trueIn PDF document text
    • http://wejufutaz.onlinewebshop.net/57675781081.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_off0000dc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC87 5284 bytes
SHA-256: 0a335f9381e241468c49c3a0f2ef86feb2fa137e81f8ca83fcb16792add82e52
font_01_sfnt_off0000ee67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE67 10696 bytes
SHA-256: f24c7ae90e125ce9d297bd933812fede088d8d5b389086dc988af34a8db11d7f