Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da449f809fe47a4…

MALICIOUS

PDF

95.9 KB Created: 2021-03-17 08:44:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f83605e7683013acee6a97948087ba45 SHA-1: e60622b1353d1bf0c965b49a3bce87dc3e1b838f SHA-256: 2da449f809fe47a43a88616db97b758917a345d8e2626d5fdf11aef169ce67e8
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://jacksth.ru/strik?utm_term=alex+rider+books+in+order+nightshade PDF link annotation
    • http://dokarukaxita.22web.org/xurekasetofegedesokopis.pdfIn PDF document text
    • http://kmplitka.shop/webitumogagapen8jdin.pdfIn PDF document text
    • https://talurepif.weebly.com/uploads/1/3/4/6/134603846/bifeper.pdfIn PDF document text
    • https://jabakatuni.weebly.com/uploads/1/3/1/0/131071057/lutiwopori.pdfIn PDF document text
    • https://subomegufixaj.weebly.com/uploads/1/3/6/0/136055214/f334a060806c2c.pdfIn PDF document text
    • https://lezanaxowap.weebly.com/uploads/1/3/2/6/132696506/e0d7a78.pdfIn PDF document text
    • http://you-bestshop.xyz/wizosezesogugar11nwt.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/jovekus/spreadsheet_compare_2016_mac.pdfIn PDF document text
    • http://nosajesu.rf.gd/purpose_in_writing_business_letter.pdfIn PDF document text
    • http://kefofasenufumug.epizy.com/48153690944.pdfIn PDF document text
    • http://ludilisi.epizy.com/australian_open_2018_women_s_draw.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/alimentacion_enteral_por_sonda_nasogastrica.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/abscesos_pulmonares_en_pediatria.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/policy_and_procedure_template_for_nonprofits.pdfIn PDF document text
    • http://debarunuzijabe.rf.gd/lanewofanipije.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/tovavugij.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/79354113919.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/what_is_the_main_idea_of_the_vampire_diaries.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/health_immunization_form_dh_680.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/nimumiganoritupaz.pdfIn PDF document text
    • http://dilalixurapa.epizy.com/42386589054.pdfIn PDF document text
    • http://bubaregelore.rf.gd/auvio_wireless_earbuds_manual.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_off00013b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B88 5348 bytes
SHA-256: 222d1e37301383162e855a36894aabc1e65f5c8c3b7423d6312fc3c065b1ffc3
font_01_sfnt_off00014db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB0 11080 bytes
SHA-256: 22d947bc963b00e29e2f1be6e2569c5be016eed0b29afad00922401f0efed366

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