Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ad30f6b436da30…

MALICIOUS

PDF

76.5 KB Created: 2021-02-02 15:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 692b07e3089976101882deddf2e630dd SHA-1: 3e82941cac4d94d91f9aa42191443699674a223b SHA-256: 94ad30f6b436da30e2c3dbd1d489bc6eecbb15df86dd85ad0dd912c78f09f0e8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, many of which are designed to mimic legitimate file downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple link farms and UTM parameters suggests a coordinated effort to redirect users to malicious content.

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://leonvi.ru/aws?utm_term=intermediate+french+vocabulary+list+pdf PDF link annotation
    • http://rusherx.studio/zefugobolit3wa8.pdfIn PDF document text
    • http://apple-fruit.space/57073906937h5xhz.pdfIn PDF document text
    • http://hookup753.fun/lifososunidaovosd.pdfIn PDF document text
    • http://nanolenka.xyz/esl_pre-intermediate_grammar_worksheets0ylvz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368996/normal_5fe35d540390c.pdfIn PDF document text
    • http://hookup158.fun/2416997523jsk9n.pdfIn PDF document text
    • http://technodom11.com/xanathars_guide_to_everything_all_subclassesojl4w.pdfIn PDF document text
    • http://sun-italy.space/wanubirudoponuac43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410447/normal_5ff7d1bb469fc.pdfIn PDF document text
    • http://vanlit.ru/metodo_del_romboasyi8.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/hcshehg/go_viral_meaning_in_chinese.pdfIn PDF document text
    • https://cdn.sqhk.co/lewoxiguj/pnjiihE/10187157479.pdfIn PDF document text
    • http://copriyghtconfirmed.com/wusad70hrb.pdfIn PDF document text
    • http://salopkisa.website/788790734164sqa9.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/jijumupade/suvigelurivimubinuwalopa.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/video_editing_software_for_mobile_free.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/medication_overuse_headache_patient_information_leaflet.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/sheep_heart_dissection_lab_report_discussion.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_off0000edb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB0 5632 bytes
SHA-256: ea5ef504f38fafb056d3b002dbd69382619a0497c62dc68f9469a47386de27ed
font_01_sfnt_off000100b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B5 10892 bytes
SHA-256: 43f570ba78355eb52f68d6f07baa4ba59ab75a1a82382de2f050b7ff9f82bab1

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