Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc20580cd9ad1e7…

MALICIOUS

PDF

74.0 KB Created: 2021-02-09 01:23:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7466e075760ad3f8fdf331ce6c781c4c SHA-1: 71b8ed8a3dbebc7b915f9d42a8379912480e4105 SHA-256: adc20580cd9ad1e75fc7eaff93af4ca8b178341758908a17aa25748c439c2332
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, including a link farm and a known malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt 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
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=lawler+middle+school In PDF document text
    • http://tubudemawaxoki.iblogger.org/hsc_mark_sheet_online.pdfIn PDF document text
    • https://likufuzojelawaf.weebly.com/uploads/1/3/5/2/135298946/gidaleled-damadafezamabob.pdfIn PDF document text
    • http://easylearning.space/datanufanevadijotwusvw.pdfIn PDF document text
    • http://jakartapro.xyz/disney_plus_hulu_live_bundle_pre_orderl9urc.pdfIn PDF document text
    • https://lividuxu.weebly.com/uploads/1/3/4/3/134354071/7712782.pdfIn PDF document text
    • http://tijijosopake.22web.org/view_rotation_animation_android_programmatically.pdfIn PDF document text
    • https://laxoweveludek.weebly.com/uploads/1/3/0/9/130970009/kidusixiba-jeguxux.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/2f44e68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jidabalelibixu.rf.gd/fox_news_reporter_ellison_barber.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/char_broil_performance_grill_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/vunogi.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/38460644475.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/flat_thank_you_card_template.pdfIn PDF document text
    • http://xoxozuzupa.rf.gd/69222770457.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/bise_lahore_first_year_date_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/janapada_geetegalu_kannada_song.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_off0000e380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE380 5212 bytes
SHA-256: 6dba8ba77fb901c19607b6955f7bd1204df41318ad27cd8517f90bd75117a5cb
font_01_sfnt_off0000f520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF520 11100 bytes
SHA-256: b57fabbd38fccb0d87ce0b89cd2cca71efb7202bae3f7009792ae8f90d062a6e

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