Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4a606f538ab784…

MALICIOUS

PDF

69.6 KB Created: 2021-02-20 09:59:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b36e18c4130c7e784dfb322bc7e193a8 SHA-1: b0602be049db57d8a8c7c0828a186c1358c6fed3 SHA-256: 7d4a606f538ab7840f809f204ead3fa72e3182c428bb66967c22c470acf9ca42
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are presented in a link farm configuration, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. 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://leonvi.ru/wix?keyword=ionic+and+covalent+compounds+worksheet+answers PDF link annotation
    • http://huaweistoreukr.xyz/9667827249micrb.pdfIn PDF document text
    • https://zaxanedipujez.weebly.com/uploads/1/3/4/5/134582154/miwer.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/ejihgif/14576505330.pdfIn PDF document text
    • http://garant-ritual.online/kenatofanitagiyxm8i.pdfIn PDF document text
    • https://tipurovus.weebly.com/uploads/1/3/2/7/132741110/8743181.pdfIn PDF document text
    • http://chambrehq.xyz/wupojirifujalupogumtbfu.pdfIn PDF document text
    • http://vbruti.site/chase_freedom_unlimited_benefits_guidenz4ch.pdfIn PDF document text
    • https://tofesozexeraj.weebly.com/uploads/1/3/4/6/134610570/salesapibalomoxaxe.pdfIn PDF document text
    • http://musc-media.xyz/91942051549bms86.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/heLqGhi/nwsl_soccer_challenge_cup_schedule.pdfIn PDF document text
    • http://naturfresh.space/brule_vive_gratuit1hzl5.pdfIn PDF document text
    • https://cdn.sqhk.co/gekobegij/PBjg3w9/all_dth_recharge_dth_recharge_app.pdfIn PDF document text
    • https://zafudibibini.weebly.com/uploads/1/3/4/1/134108698/83017f2fce9ea.pdfIn PDF document text
    • http://copyrightnotices-form.com/handwriting_worksheets_non_cursive61t2t.pdfIn PDF document text
    • https://vugesajovor.weebly.com/uploads/1/3/4/2/134265649/8858706.pdfIn PDF document text
    • http://cashbackmoney.info/dr_najeeb_written_notesv57c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d4be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BE 5468 bytes
SHA-256: da3bb3c5c0da40e4a97b152f9df0f7b37490cd152fdf2f94d904413d15d269a9
font_01_sfnt_off0000e73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73C 9984 bytes
SHA-256: c32e8d3b2d3f4cd44711c6671beebd5efc77d28a4ae40eb062d64e258126c4cc

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