Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc05fbe94ed9c16…

MALICIOUS

PDF

78.7 KB Created: 2021-03-05 06:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ad8191ba43655abdc8b18a52b234459d SHA-1: 9c18255e12cf5d9f04e6e85939afc2b8e9bceb29 SHA-256: edc05fbe94ed9c16186972b8c41a3d2318c0d90a90f91e18579adf86a6e27131
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated, but the presence of external URIs and link farm heuristics strongly suggests the primary goal is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/123?utm_term=specific+gravity+of+transformer+mineral+oil PDF link annotation
    • http://werenntaq.online/26955641219ep63w.pdfIn PDF document text
    • http://yewes.space/zuxevagusagoganilefivivonyv7zx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408172/normal_5ff554f34c171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446283/normal_603d0e0aab08e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446499/normal_60076e26ba399.pdfIn PDF document text
    • http://front-glass.space/toddler_bed_sheets_walmart_canadaqa6gl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414849/normal_5fc9b8d05135f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410722/normal_5fcf5a6b2c738.pdfIn PDF document text
    • http://komarovskii.xyz/sentence_construction_worksheetzujrc.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/48304923487.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/e84a8b5c-9f82-41c1-b901-ee8e0d796c0b/2230718035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba9b751-4f0d-4554-b88a-43c80653d4d4/is_program_management_the_same_as_project_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76704865-3a5c-41b9-bcf1-ee6178ad53c7/symbol_ls4278_scanner_user_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed00b361-fc4d-46d9-a74f-c8a30b5f886b/45116664345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c94ae0ca-97ab-4a24-aa62-f036c3242435/molafopoxudifani.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/bebuzobafozipopurag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ea1d904-7531-476c-805d-9a4a390463e0/sta_rite_pump.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5eaeba2-8e12-439d-9b12-ece057a84e76/panabegezovuted.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9bf5f56-3d5e-481a-ad22-18db54c93bcc/who_fixes_lg_washing_machines_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276cd809-ceb3-4be0-a6f7-1f7bc6fd12a1/lebokavarasebinamapife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af0fd838-4b67-48b6-80fb-7a37ac986315/4941395446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba26dbf-3969-4dc4-b614-b93b2d6dbcfa/2597835702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f552cc-05ee-4a0e-9b86-26ceedc305b2/bokupomegeb.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_off0000f579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF579 5600 bytes
SHA-256: 7e38ebc1d5f3f2c7b5247bfa8671181f68f6798ab82addc418bc8b3f1f9edb09
font_01_sfnt_off0001088a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088A 10712 bytes
SHA-256: d3645f6c663101eb2e797c6145388719f6269697386724589d75f5fd01bc2e54