Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2b73e3dae3181b…

MALICIOUS

PDF

74.2 KB Created: 2021-02-09 07:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 34a98c1df89cc22c70d4ec38185bd4cd SHA-1: e28ec4c8bb4d66d9c8a8f8f77c161a3d2861d07e SHA-256: eb2b73e3dae3181b47a887c8ecaa5114d46bc24883399b700d4f1f9ce528cf84
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 0.9998

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 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://bologen.ru/aws?utm_term=elite+dangerous+ps4+bounty+hunting+guide PDF link annotation
    • https://xumizobizuzu.weebly.com/uploads/1/3/4/6/134688834/xuwibopi-xutade-zudejilos-fewovedizuk.pdfIn PDF document text
    • http://cardio-active.site/name_generator_pubgiev3x.pdfIn PDF document text
    • http://itabody.space/68876727369z7cli.pdfIn PDF document text
    • http://ketrovk.xyz/radio_online_romania_magic_fmku07a.pdfIn PDF document text
    • http://lolkek.xyz/define_parliamentary_form_government2ss9u.pdfIn PDF document text
    • https://lisopivoxo.weebly.com/uploads/1/3/4/9/134901835/71f59384a0e.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/cjcQgie/coloring_books_walmart.pdfIn PDF document text
    • http://helpverifybadges.com/arizona_martin_luther_king_dayduoad.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/bufexa/wajezorexibawotelofixe.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/vitamin_b17_sources.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/61420317047.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/nausea_sartre_ebook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/48281532637.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/90467554399.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/aowvn_stardew_valley_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/fatokokawurukonetodef.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/reporting_repeated_measures_anova_results_apa_style.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_off0000e4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F0 5508 bytes
SHA-256: 8d2f2367a8ea70b5b4eb637760ff9baebe473c1cbcac63e6e948f096a31249ae
font_01_sfnt_off0000f7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AE 10528 bytes
SHA-256: a9c2c320cc94bf3191d1ef3fb72ca4a148e21f42577c73c5c3f8ebc266145b8d

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