Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2df2233de81e70…

MALICIOUS

PDF

71.9 KB Created: 2021-04-04 12:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e47d136611635f7bd5311966e4e54f94 SHA-1: cd099f8c8089bfdbc1023d96ad2a17831d6bfebe SHA-256: 9f2df2233de81e70b81044c6009513a07ae68b8238f1af66bdf411f968bf815d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/award?keyword=ielts+writing+task+1+and+2+general+pdf PDF link annotation
    • http://moneyindia.site/jexawogifo2tr.pdfIn PDF document text
    • http://vzroslyh.net/11184676806igt25.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/dZAJOTT/pac_man_vs_snake.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/70914060958.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/definition_of_community_service.pdfIn PDF document text
    • http://kupivse.xyz/721503473634haa9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481417/normal_5fe50b7868c25.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/ihjagjV/69323548875.pdfIn PDF document text
    • http://kepuxom.mypressonline.com/sepazusasomuj.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/NcighCL/how_to_draw_baby_yoda_face.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5fdc74e129a76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_601c5fcf8968a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xutenasejubibe.atwebpages.com/bteb_result_2020_8th_semester_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/xuledal.pdfIn PDF document text
    • http://velelakolifuvu.onlinewebshop.net/bods_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/98832040089.pdfIn PDF document text
    • http://deneboj.rf.gd/accouchement_dystocique_memoire.pdfIn PDF document text
    • http://tisedofefesowim.epizy.com/where_can_i_get_my_pressure_washer_fixed.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_off0000dabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABF 5488 bytes
SHA-256: d127d2dab3bac04475f5e60f33077428570910775726a57ccaf6894223b55d6b
font_01_sfnt_off0000ed93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED93 10892 bytes
SHA-256: 2203c9132a3411937dae5b65ac6878ff202c011b2400cbfb19c60a34fe54b854

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