Malicious PDF — malware analysis report

Static analysis result for SHA-256 582aa41e7968b591…

MALICIOUS

PDF

74.9 KB Created: 2021-04-08 07:15:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8363a4d2c5daa3be6124b21ab58abaa5 SHA-1: 2c2f869c96539fc0b521a77341b1efd0178b33af SHA-256: 582aa41e7968b5912bfc398a72a8ef5ce11978fbf03b29373f81ab779eaa9892
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The embedded URLs and the PDF structure are consistent with attempts to disguise malicious content as legitimate search results or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • 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://xajibur.ru/strik?utm_term=digitech+rp360xp+demo PDF link annotation
    • http://edayafar.xyz/gekadisufudojowekaligkqd.pdfIn PDF document text
    • https://budovabi.weebly.com/uploads/1/3/4/5/134510119/bijola.pdfIn PDF document text
    • https://lorebanoga.weebly.com/uploads/1/3/0/7/130738704/fumixidasifaso_norugipud_barumisafew_tifipibigod.pdfIn PDF document text
    • https://pimimazeso.weebly.com/uploads/1/3/4/5/134523822/ba849b2c784e.pdfIn PDF document text
    • https://kapokifi.weebly.com/uploads/1/3/4/5/134510442/jiwajopunujujaruboba.pdfIn PDF document text
    • http://zdsshop.top/knife_making_blade_templatesczm3j.pdfIn PDF document text
    • https://jedavosezinuli.weebly.com/uploads/1/3/1/4/131438835/mufubobiku.pdfIn PDF document text
    • https://dugigoje.weebly.com/uploads/1/3/4/7/134754128/dazulanujo_pixawozodup_titakikabosugaf.pdfIn PDF document text
    • https://zomereke.weebly.com/uploads/1/3/5/3/135397468/2343464.pdfIn PDF document text
    • https://dibumofum.weebly.com/uploads/1/3/5/3/135313591/6118426.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/dd97cdec-d35d-4453-9272-c5a1a6699dbe/sas_ods_html_output_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d025380-2f54-4fb2-84aa-ff693b261d64/tres_metros_sobre_el_cielo_3_pelicula_completa_espaol_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae7afd27-4c3e-4d2d-8efd-7997b19e2a14/how_to_compute_late_payment_interest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e443b149-ad95-4b3a-b0f7-b48cf987a906/inferno_di_dante_gole_dellalcantara_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/344ca557-eb93-45f8-b947-626c1c8f27f9/xojabezopazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e33151b-2761-4960-9971-ac0fc0cdb568/whats_a_better_word_for_confused.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7eada38-0491-4341-a53f-91c78c616c16/what_is_management_skills_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c3e1ca-5523-4f1a-bb50-f4f1f35783cb/nanostation_m2_loco_setup.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_off0000e65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65A 5592 bytes
SHA-256: ed88e18834213972c2e00ecf883cc9c1c37391b1eb7b599fae083093873488c3
font_01_sfnt_off0000f94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94C 11264 bytes
SHA-256: f1d8fe869a3dab3c16630bb7b56af5d06ea185798524e9348a0abce640b8c135