Malicious PDF — malware analysis report

Static analysis result for SHA-256 94be9bcb0325481a…

MALICIOUS

PDF

81.9 KB Created: 2021-05-10 05:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4574c619f244c898b85b373823250870 SHA-1: 05899194146522b99cd5ece70004af9238f908dc SHA-256: 94be9bcb0325481af97c48ea696bd78aa4a4de358778793e580d411541c6ccda
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains a link farm with numerous external URLs, including a primary suspicious URL, designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to 'Dr seuss book list in order'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=dr+seuss+book+list+in+order PDF link annotation
    • http://visatog.22web.org/pofax.pdfIn PDF document text
    • http://shop-kid-toys.online/betrayal_at_house_on_the_hill_game_reviewrg7n1.pdfIn PDF document text
    • http://pidisivusosizaw.22web.org/kenneth_hagin_healing_scriptures_cd.pdfIn PDF document text
    • http://vuxiparami.22web.org/gevaxanabasirawakufogudon.pdfIn PDF document text
    • http://balonedud.iblogger.org/12392862076.pdfIn PDF document text
    • http://bellissimo.online/what_kind_of_batteries_does_the_graco_swing_usekd14j.pdfIn PDF document text
    • http://steh-sistem.ru/gafozifasamirozijebanz2pg3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_83cb0b2c73ee4a029a23312d78ef53c5.pdf?index=trueIn PDF document text
    • https://e24ff460-1725-4b9d-a7de-f8438c38fea0.filesusr.com/ugd/366850_6f17a6eb7d1148f7ac638db496fab330.pdf?index=trueIn PDF document text
    • http://xusexupilaru.epizy.com/71391480221.pdfIn PDF document text
    • https://e25b7b56-d8f7-44cb-9276-56428e53d1cc.filesusr.com/ugd/63f3e8_a6199f24bb754444bb7cebd57bebaaf5.pdf?index=trueIn PDF document text
    • http://bugifub.epizy.com/amrapali_old_movie_free.pdfIn PDF document text
    • http://nederanunotaz.rf.gd/61215659286.pdfIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_b24520a80b5447b98dcfa0196b875420.pdf?index=trueIn PDF document text
    • https://c72a6d71-2fad-4f5a-8b7a-a7c165485bce.filesusr.com/ugd/a4966f_d2c3da6904d04c72b678bd61fdd87c0e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdbd42e7-024e-49fe-9840-25d89451621a/integrated_chinese_workbook_level_1_part_1.pdfIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_87a06c1bd9cb414ab5cf5505127d1df5.pdf?index=trueIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_86d0918ade7e472fa3bad9b9766d1181.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c21dd5ea-e1e4-497d-b144-ec316028842c/79235639412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/720a78f4-95f0-498e-bd2c-623f34a38670/being_in_love_osho_read_online.pdfIn PDF document text
    • http://xaresuvilum.epizy.com/cordon_umbilical_funciones_y_caracteristicas.pdfIn PDF document text
    • http://refewededuxita.epizy.com/52095832005.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_off0001035f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035F 4812 bytes
SHA-256: b0973a98e8e0a764cda82b2977b9ad1c4b461ca6e438c537985bcdc19d35a7f4
font_01_sfnt_off000113ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CE 10876 bytes
SHA-256: 840f287b1fd44ad35910ad3f2b3dbcbbd680d80ebe45f3d4fa9c36811b0c8242