Malicious PDF — malware analysis report

Static analysis result for SHA-256 9beb775f99caec58…

MALICIOUS

PDF

75.7 KB Created: 2021-04-09 12:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0b3d5951f8399b1316195634ebd809a7 SHA-1: 70f1037b84fef93313a6431fe62e114329b96874 SHA-256: 9beb775f99caec58325bba5cdb5798bf545b78279b7230b1525d6b107040383d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=how+to+use+stealth+cam+card+reader PDF link annotation
    • http://rezonansmusic.com/vexajedutiej8qd.pdfIn PDF document text
    • http://job-finder.space/kagazovetapigus3cfl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_60338a604e6ed.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/10952995307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402938/normal_603ad54637e73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417141/normal_6051dcb3c4aeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490251/normal_605a727e4b624.pdfIn PDF document text
    • http://trysucre.pro/nukixilefoyss9r.pdfIn PDF document text
    • http://design-kvartira.info/servitta_s50404leiiy.pdfIn PDF document text
    • http://livifobin.22web.org/pathophysiology_of_acute_lymphoblastic_leukemia.pdfIn PDF document text
    • http://buviturowugigew.66ghz.com/mofimo.pdfIn PDF document text
    • http://itanah.space/52080890909dasbb.pdfIn PDF document text
    • http://garant-ritual.online/best_ar_15_assembly_lubekf4om.pdfIn PDF document text
    • http://usacreditmonitoring.info/fosavajomebutku485.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5ff7f07c6f0ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://matewedidoxeber.onlinewebshop.net/66877855504.pdfIn PDF document text
    • https://6b551870-9d71-4c88-87ac-30bafd697196.filesusr.com/ugd/b27e13_98958b9dde9941868a82e382c62b049f.pdf?index=trueIn PDF document text
    • http://vojemigami.rf.gd/kugila.pdfIn PDF document text
    • http://zujugefov.rf.gd/devexpress_report_designer_internal_server_error.pdfIn PDF document text
    • https://5fb3b2f4-e86d-4029-b823-ac5950ddf4c1.filesusr.com/ugd/c0aa49_716f31f113614d9fbcf53ff88621b4fa.pdf?index=trueIn PDF document text
    • http://pisisagul.epizy.com/history_of_bhatti_caste_in_urdu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 5232 bytes
SHA-256: 6cd90c5d494d5337ba29534ac5fdd73cb98f982fb998c7c1a00753e0df7b97f3
font_01_sfnt_off0000f4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DF 12896 bytes
SHA-256: 0ed6bc9da143f8cee544c70993d56b3dfbade92cd4d66e471013fd46cea24a61

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