Malicious PDF — malware analysis report

Static analysis result for SHA-256 efad56503c8912eb…

MALICIOUS

PDF

85.6 KB Created: 2021-04-07 18:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d58c8599dc63ce0c5b74453b5bcee182 SHA-1: 2e36bea7ca5a1fc49b9e6df429f0cd6c33ef4210 SHA-256: efad56503c8912eb187142f3e9cb644b7dc040f6428c0ce0f7b8829f159e835f
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with a high concentration of links on disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=lakshmi+ashtothram+in+telugu+naa+songs PDF link annotation
    • http://lololoj.sportsontheweb.net/canonical_ensemble_derivation.pdfIn PDF document text
    • https://rudusixan.weebly.com/uploads/1/3/0/7/130775573/gexoguguwabusel_minisosi_bikugimuje.pdfIn PDF document text
    • https://xonesomo.weebly.com/uploads/1/3/0/7/130739362/242edd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448556/normal_5ff01b27431a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446650/normal_6003faebcf790.pdfIn PDF document text
    • https://monokuzofo.weebly.com/uploads/1/3/2/7/132741222/5480798.pdfIn PDF document text
    • http://wuvovewapug.iblogger.org/28729669734.pdfIn PDF document text
    • https://nonejazusedebe.weebly.com/uploads/1/3/6/0/136099570/kutegune.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445334/normal_6068cf5b9cf62.pdfIn PDF document text
    • https://tekofudarazot.weebly.com/uploads/1/3/1/3/131381521/c0791012988d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469643/normal_600dde8cceca9.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/albert_einstein_theory_of_relativity_paper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416656/normal_5fe7a1e581aaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e8d3cdc-9888-4200-ad43-07957fb9cc3a/rejimerabisaruro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfaaebb2-9777-4f05-91d3-d85284b017e9/how_much_does_gorilla_trades_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d74cdf44-d157-494e-a12a-b884f311fe1c/why_is_my_wireless_keyboard_not_working_properly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2065428a-08ff-4a85-81f2-b6bb1b606d66/25125940972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8539fe7-6aaf-4fa4-b50f-f51672e9df6c/how_to_score_points_in_crib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eb7fa71-b391-43cc-8d32-e4ede6242eea/baldurs_gate_2_best_class_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/856b4bc0-7078-48c6-836e-dbc60fd618a0/sampieri_metodologia_dela_investigacion_cualitativa_y_cuantitativa.pdfIn PDF document text
    • http://relavidapozo.epizy.com/kowikizi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC07 5104 bytes
SHA-256: 85ac11b50d3b3054b5c2d7d1b24518d3137f3e0ffc03af7a4ca2d51ffba914c6
font_01_sfnt_off0000ed3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3C 12576 bytes
SHA-256: c136d5cfb6bed0e0895a1e3a99a53d0c868d39fafaf2287ee020b6ea682aaf9f
font_02_sfnt_off00010f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F00 10280 bytes
SHA-256: 9c428fbcc409d154804173c7fe9a6fc7b4dc566742e95a5d41d6ac98f20e7671
font_03_sfnt_off00013284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13284 16224 bytes
SHA-256: 53215fa94485d380bcfc02fccd1a7a25057d6d657321956405aeddcb36a3b5ce