Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea716a02f87a048…

MALICIOUS

PDF

75.3 KB Created: 2021-03-04 16:34:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1c621f92101b1d79862d05f5103e9f5a SHA-1: 16852ed5d3113c182070f61a445d87bc09d87fd2 SHA-256: 0ea716a02f87a048a848c516376e46faa510a345a9fc6985eb49a48439caebc6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/strik?utm_term=quotes+life+is+short+be+happy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367622/normal_603ba84349292.pdfIn PDF document text
    • https://tuxativavowaz.weebly.com/uploads/1/3/1/4/131437956/983310.pdfIn PDF document text
    • https://xanugobolenaz.weebly.com/uploads/1/3/4/3/134371028/webopo_luzogul_vanonofetubani_gomoj.pdfIn PDF document text
    • http://vkrowl.com/delf_b2_junioroub9g.pdfIn PDF document text
    • http://bimemonok.22web.org/31308145052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_603dee79d6ac2.pdfIn PDF document text
    • http://shoop-fm.ru/myanmar_rohingya_un_reportle67d.pdfIn PDF document text
    • http://desenusexewu.iblogger.org/facebook.com_account_settings.pdfIn PDF document text
    • http://edevletorg.com/6836864205oipu9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478123/normal_5fe5b090a0223.pdfIn PDF document text
    • http://accueilcmb.com/10044948703v3yuv.pdfIn PDF document text
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/10799733d92b109.pdfIn PDF document text
    • http://sozikibonoda.iblogger.org/16482612891.pdfIn PDF document text
    • https://vipigenomunopem.weebly.com/uploads/1/3/1/3/131398348/povazomitu_wuvob.pdfIn PDF document text
    • https://wivutukezed.weebly.com/uploads/1/3/1/4/131438473/03573.pdfIn PDF document text
    • https://zudobusida.weebly.com/uploads/1/3/5/3/135330479/lazufosopazejuzuv.pdfIn PDF document text
    • https://mujolimu.weebly.com/uploads/1/3/4/8/134868529/8757f42cdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_60335248dac47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ludujefu.epizy.com/a4_sheet_height_in_pixels.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/rubiwoxapul.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/free_template_brochure_indesign.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/31218145307.pdfIn PDF document text
    • http://gorudagomi.rf.gd/susabej.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_off0000e997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE997 5292 bytes
SHA-256: bcbb3a8177ea4fe13d7e9573975840b2fd98fb40adb750b0c1a0fda75e4f444b
font_01_sfnt_off0000fb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB93 10708 bytes
SHA-256: 3b7db320a9a5dd0298403441a2d1aeb14ef1ce34d8c5b4e2f261863f22dd3973

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