Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b05dd597940a3e7…

MALICIOUS

PDF

73.6 KB Created: 2021-03-13 22:30:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1d1b1cf28710b95914c387b3a1b99306 SHA-1: c224c244d7c5c265455d700638e9a0a39d25871e SHA-256: 8b05dd597940a3e7c5a298729e95606cdd786a4006692cc6e64c321b3d161be6
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, likely for phishing or redirecting to malicious sites. The presence of external URIs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wix?keyword=texas+family+code+standard+possession+order PDF link annotation
    • https://kesadoxiluxar.weebly.com/uploads/1/3/5/9/135974677/vumuwikotojanujumini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5fd911002ffde.pdfIn PDF document text
    • http://zatoboyvibor.fun/gaudeamus_igitur_sheet_musicdvi6v.pdfIn PDF document text
    • https://cdn.sqhk.co/nufolibizer/haidggi/hc-_sr04_schematic.pdfIn PDF document text
    • https://cdn.sqhk.co/lojadisexudo/jgjhVKg/9992440764.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/lapen_sisekobanoxana_kiwowami_jadugonevijuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408599/normal_603ba5cfafcb4.pdfIn PDF document text
    • http://imkl-checker.com/yardman_riding_mower_keyj7sev.pdfIn PDF document text
    • https://neriborotarisim.weebly.com/uploads/1/3/4/3/134345051/224de40d.pdfIn PDF document text
    • http://hookup755.fun/sakurolopipegovevisadi63bn.pdfIn PDF document text
    • https://butadopol.weebly.com/uploads/1/3/1/3/131378795/b0ec8a8d97e71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372987/normal_5fc7a7338e37b.pdfIn PDF document text
    • http://sportita.fun/tawapo1j0lh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/cannot_connect_hp_printer_wirelessly.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/what_day_does_walmart_restock_clothes.pdfIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_49f59ddb93c942b3881aac29af16c855.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/41050927755.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_2a16b93434cb45b986ec45189c6cab3b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE486 5420 bytes
SHA-256: acedb1210860a61a9ab561285999ed12b770dc86827207031b90d6e51c082c59
font_01_sfnt_off0000f6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E9 10096 bytes
SHA-256: 02c026dfbb511d95f32a04fefc88d746044d86d74ca31c3a575856b8761e8c99

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