Malicious PDF — malware analysis report

Static analysis result for SHA-256 f734d5533b696386…

MALICIOUS

PDF

72.0 KB Created: 2021-02-25 21:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d250c046edadac106db16d49cc661cca SHA-1: 3ab70b93708654b55210e4516264a0cbf9a500ca SHA-256: f734d5533b6963866e872831ab0388467443cf0d3ae0fd739af9c47a42a5c70d
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://yafferge.ru/wix?keyword=artist+research+worksheet In PDF document text
    • https://tiruvodeg.weebly.com/uploads/1/3/4/8/134892329/lolumukisasufij.pdfIn PDF document text
    • http://merovew.xyz/musobifuk30f4f.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/financial_statement_analysis_and_valuation_4th_edition9b7ph.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393637/normal_5fe2118b75c1c.pdfIn PDF document text
    • https://lajexupizad.weebly.com/uploads/1/3/0/7/130775806/3205076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_6023cc7e21014.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/ggYQIhi/racing_car_colouring_book.pdfIn PDF document text
    • https://wodumipanopova.weebly.com/uploads/1/3/4/7/134731655/2737952.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/vieja0W/vivoranama.pdfIn PDF document text
    • https://zokutiwako.weebly.com/uploads/1/3/0/8/130873782/bevumebub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374840/normal_5fc8ed557bb94.pdfIn PDF document text
    • http://ita-yog.space/from_gene_to_protein_transcription_ami7k7.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/idgdgjQ/percentage_change_formula_in_excel_with_0.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/nimuwet/flex_head_mattress_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/cadillacs_and_dinosaurs_hack_set_3.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/32897672674.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/zutanenet.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/how_to_calculate_linear_velocity_from_rpm.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/5768454077.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_off0000dec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC9 5000 bytes
SHA-256: 9a0e780f3f36ef92ae548beca00f8dc2647ef6ec222ac5cc20e39d1a48e5aa38
font_01_sfnt_off0000efd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD6 10352 bytes
SHA-256: 3a20c8132804dce1fe0413fecefcafa1150ad1f59c0cad48834de3ded312a85c

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