Malicious PDF — malware analysis report

Static analysis result for SHA-256 16837c3b0b5072e4…

MALICIOUS

PDF

74.7 KB Created: 2021-03-26 07:41:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9644cb935eb844cd4ead0b6e67f302c9 SHA-1: 99b49b95e6ac8af67af09be401e4351b81ed14be SHA-256: 16837c3b0b5072e4ee4e0239aca17c950444b939d0bbce76a013a92afbf915dc
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically directing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'pool deck plans'. The presence of many external PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=above+ground+pool+deck+plans+pdf In PDF document text
    • https://gurovepulebeguj.weebly.com/uploads/1/3/1/1/131163897/vanisikisufiseruken.pdfIn PDF document text
    • https://vasaxufunibax.weebly.com/uploads/1/3/1/6/131606743/xapiv.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/hgcHAVT/war_songs_ww2.pdfIn PDF document text
    • https://marezupudi.weebly.com/uploads/1/3/0/8/130874377/fezel-zulebafoxajug.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/k0he5oS/lost_grimoires_3_the_forgotten_well_walkthrough.pdfIn PDF document text
    • https://nezovudaposuru.weebly.com/uploads/1/3/0/9/130969726/959da.pdfIn PDF document text
    • https://nogetutiru.weebly.com/uploads/1/3/4/7/134711470/9c4e7122d7aaf78.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/001c881b-73f9-47e3-8acb-4a54907a5b0c/beats_studio_2_wireless_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/emotional_intelligence_2._0_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/director_loan_in_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/titekasidanimopuruker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89498360-71cc-492d-84ea-6183a77851c8/xibodedekamewojewepiwugiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e8fe3b4-1fe6-4001-b62c-25a9f1600b08/what_is_the_mood_at_the_beginning_of_the_fall_of_the_house_of_usher.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/apk_bunny_live_free_coin.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/descargar_juego_de_la_viborita_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/peranefofolatanusededos.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/chadariya_jheeni_re_jheeni_song_raagsong.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/underhand_barbell_row_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/how_do_you_use_a_blender_step_by_step.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_off0000e83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83B 5576 bytes
SHA-256: 6e90374292107c5c57d380420120949e82f9ab65ea17be0e4d72e2baa1d99cce
font_01_sfnt_off0000fb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB49 10328 bytes
SHA-256: 61fcd17a4aeb3a7d0164478c27cc9748d0b89e4c4c55815f37a23226a06cdb18

Open this report in the interactive analyzer, or submit your own file for analysis.