Malicious PDF — malware analysis report

Static analysis result for SHA-256 37bbfe7f8f892cb2…

MALICIOUS

PDF

71.0 KB Created: 2021-02-20 18:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 52d15e380fb1ec853c878a2322a260d1 SHA-1: f902e9c3dd72d4d4b0a53aa7d710e42f5cca74ee SHA-256: 37bbfe7f8f892cb24293315df29e253491d8c1cb5ba082ea97170956cb7f3fb2
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=double+replacement+reaction+worksheet+practice+reactions+answers In PDF document text
    • http://carbackseat.site/zetewivenogitaje2j507.pdfIn PDF document text
    • http://klokisik.space/gabriel_malonic_ester_synthesishd1z9.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/jinogutalibon.pdfIn PDF document text
    • http://tufipenuvabiwed.iblogger.org/brother_mfc-8950dw_toner_reset.pdfIn PDF document text
    • https://pafetujesotizi.weebly.com/uploads/1/3/5/3/135348857/1270447.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/bar_chords_chart_printableqximv.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/fESrhhN/92806914657.pdfIn PDF document text
    • http://eslivdrug.space/order_confirmation_template_html_code29kzc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kirotomi.epizy.com/kogawevufiwifuzaw.pdfIn PDF document text
    • http://gabigirinekib.rf.gd/92130482149.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/digital_media_marketing_plan_template.pdfIn PDF document text
    • http://nufewusuk.rf.gd/loroxiweru.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/17840781960.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_off0000d8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FC 5468 bytes
SHA-256: 64d82b332d90afbd11b9105d692562f0128b3dc48065e28a65215b7240068b87
font_01_sfnt_off0000eb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB79 10224 bytes
SHA-256: b1df3b92d93e315378c7d31083df364818bfeb383747d2ee8fa9fbfa38e424bb