Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1eb496e2cb2e3e…

MALICIOUS

PDF

87.9 KB Created: 2021-03-16 10:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 98f98ea24719fcbf2bce64052a55960e SHA-1: b1492a10597cb5a5fd6f0728229d975f5a807281 SHA-256: ed1eb496e2cb2e3e8d888120a9ca765d8513313ff35d55465164056904c28ce8
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=lg+27uk600-w+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499317/normal_60209a46294af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_6013189df2454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405652/normal_6034308adf20f.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/hjfFhhT/79677627956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_601d2f2437ce8.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigozujeme/Djbihjd/14565548014.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/hhjaWgd/rowirojokivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469824/normal_6037353c50f31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467273/normal_5ffea28d46e08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481272/normal_6013a4946ab3c.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/6geijjg/vintage_milkshake_maker_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409409/normal_602a2c015ac3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_e1a5eca5a52e4bda98b19154bc6b6f8b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/dunkin_donuts_sugar_free_vanilla_syrup_nutrition.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/febejikovefumutarasura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee35eb0d-3bde-4a2f-9673-ab521a01c1e7/66015439022.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/how_to_get_neutral_from_3_phase_transformer.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/auto_launch_android_app_on_boot.pdfIn PDF document text
    • https://f803bf1b-e1c2-47f6-a41f-c9785c88fbd4.filesusr.com/ugd/bf07b1_d06e2987e644492e89d4e5ee2bc44f5d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/300cf262-4ea1-4f11-97df-51683d12b719/baxabugiromexuxoxevavurel.pdfIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_e3994d75eb884b0ca64edb75b617f76c.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001057f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057F 4716 bytes
SHA-256: cba786ba683b19361d89e23d6be118654aec7e00a36a7586ade070baf177feca
font_01_sfnt_off000115c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C0 14000 bytes
SHA-256: 5ede389a98b859d98f7f979760977230e8c9dc82986f613d68d7938f0189a23c
font_02_sfnt_off00014289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14289 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333