Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae9b451d0ea0430…

MALICIOUS

PDF

76.5 KB Created: 2021-04-28 07:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: de0001a3d816192cb328d8f437c148e5 SHA-1: fd80520487db2fea8cdfa13778444c90344c4eb6 SHA-256: fae9b451d0ea0430309032fa8f5cfeee5d099e2df171de6e8f473b5a09642ca9
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting and another pointing to a URL with a 'strik' parameter, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful 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
  • 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://dugedepap.ru/strik?utm_term=black+no+more+pdf PDF link annotation
    • https://cdn.sqhk.co/xovujiroveg/hthigh9/attack_on_titan_ep_guide.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/hdfc_mutual_fund_sip_form_download.pdfIn PDF document text
    • http://gazajujana.mygamesonline.org/63474138527.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/jeu_de_carte_32_et_52.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/76577626022pzwof.pdfIn PDF document text
    • http://baboguzaxeleju.mypressonline.com/balancing_chemical_equations_pogil_answers.pdfIn PDF document text
    • http://reznitskygallery.com/jizekepehph3.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/georgia_armenia_azerbaijan_lonely_planet.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/K9IG9hg/70s_soul_music_artists.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_e793a73a334442c4baa1a3eb70bb9c22.pdf?index=trueIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_6a249ef6821e402198607cd68451e003.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e677337-64c0-48f6-83ad-003cdd44960e/elements_of_floral_design_form.pdfIn PDF document text
    • http://kabuzore.atwebpages.com/cfa_level_3_2020_curriculum_download.pdfIn PDF document text
    • https://7a48fde5-f9d1-4ce4-84a2-8b156d245d18.filesusr.com/ugd/8127dd_4437dafc08f74e1b85a0607ac3e7a755.pdf?index=trueIn PDF document text
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_c0a0ed83bddc47259246daa383e8cf9b.pdf?index=trueIn PDF document text
    • http://jezevenakos.myartsonline.com/4th_grade_math_practice_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54251e49-6788-4851-b746-41b98f9bba6c/wazofi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EC 4896 bytes
SHA-256: 0a5b706403bb0086c91e28a685f8cb5b57b0e025e945f91e5c9279e37a645c7d
font_01_sfnt_off0000f26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 10780 bytes
SHA-256: 1c452d5e37ca0925b4be09f54cd2952004756dbffb4b14de02816da5828e59fc
font_02_sfnt_off0001175b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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