Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2167471dfeaea4…

MALICIOUS

PDF

75.7 KB Created: 2021-03-14 04:28:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 5aa53dde3af985727f58edcfd196e802 SHA-1: b517a3679e89939ced04e08337f7cc4a83b0b8b8 SHA-256: 7a2167471dfeaea45ea539c927f929e9fb943fadd7631e8ec83df4f2a1df82bd
166 Risk Score

Malware Insights

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

The PDF contains multiple suspicious links, with one explicitly noted as an 'invisible link to suspicious domain'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://druttle.ru/wix?keyword=realtree+pink+camo+car+seat+covers PDF link annotation
    • http://dimax-matrasy.ru/11302048878whcrb.pdfIn PDF document text
    • https://ponawexem.weebly.com/uploads/1/3/2/7/132740185/wilozagezawib.pdfIn PDF document text
    • http://didazema.mypressonline.com/90762187107.pdfIn PDF document text
    • http://meetraisins.club/aviso_de_privacidad_formator88p5.pdfIn PDF document text
    • https://cdn.sqhk.co/juvowisire/c4jhigd/75349233944.pdfIn PDF document text
    • https://pomudimukiribob.weebly.com/uploads/1/3/5/3/135313003/jewoxobalil.pdfIn PDF document text
    • http://openlait.pro/is_a_beats_pill_worth_itesq61.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/2hi0igj/tadixusutukuxas.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/elementary_geometry_for_college_students_downloadufoqd.pdfIn PDF document text
    • https://zuvumurujibuza.weebly.com/uploads/1/3/0/7/130739557/4639668.pdfIn PDF document text
    • http://nout-prodat.site/kochi_rajavu_malayalam_full_movie_download8vzt6.pdfIn PDF document text
    • https://vawavujak.weebly.com/uploads/1/3/4/3/134350312/bf6a5.pdfIn PDF document text
    • http://gapijet.scienceontheweb.net/fufurukuwapimobitokoful.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/ieK8rjd/new_ore_mods_for_minecraft.pdfIn PDF document text
    • https://zakewurez.weebly.com/uploads/1/3/4/4/134471700/6924521.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/xomepixo/real_estate_independent_contractor_agreement_template.pdfIn PDF document text
    • http://dopovis.myartsonline.com/94889715615.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/78966688008.pdfIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_76fb755b5ae04b9ab5bc5e82bdb2fa79.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/46350162053.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/nuxosoruwafeguxeju.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/pufalawonebaroxenebote.pdfIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_7c9d72710c2c4b099681101d94c14c7b.pdf?index=trueIn PDF document text
    • http://duwemanuwixam.atwebpages.com/vemekijuzitinivewivalu.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_off0000e6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E9 5208 bytes
SHA-256: be3161b0a99ac42d4c278de7b0ae0b94dbc7074317154ee59a62aa4e64e4e1e2
font_01_sfnt_off0000f897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF897 11584 bytes
SHA-256: 43248becb2f7ec45fc573eb907610aee29b72b51952b8e100fb1c134d9d802af