Malicious PDF — malware analysis report

Static analysis result for SHA-256 734aef89fc76d5ba…

MALICIOUS

PDF

72.7 KB Created: 2021-02-20 14:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e895ff7bb2669f9aee52b351a21584b8 SHA-1: ac17e915317239605e6126df462557cb48f89437 SHA-256: 734aef89fc76d5ba275a24c395069b64ddf949fe61d6d59efdd37695d062d7f4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, indicating a phishing or malicious content distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to deliver second-stage payloads or redirect users to malicious websites.

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
  • 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://seumenha.ru/strik?utm_term=the+crown+season+2+cast+tony PDF link annotation
    • https://cdn.sqhk.co/pujixefan/dBSG0ic/zuzekelarufewositole.pdfIn PDF document text
    • http://rollernefritmassage.xyz/batazekuvtsv3a.pdfIn PDF document text
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/gigexixo.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/gibjdhg/bemepexidazi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488807/normal_6013a536228a1.pdfIn PDF document text
    • https://zasiranel.weebly.com/uploads/1/3/4/5/134507270/xofufowegiwomamasomo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387428/normal_5fe5d749a8bc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417648/normal_6006eca4ebc3f.pdfIn PDF document text
    • https://simisodiguguvig.weebly.com/uploads/1/3/5/3/135324772/xejezopag-tumavusuw-godivimuranak.pdfIn PDF document text
    • http://www19216801.site/fagajumenedu7u53a.pdfIn PDF document text
    • https://gisunada.weebly.com/uploads/1/3/1/4/131409009/8996373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451561/normal_6025dde0e3ba3.pdfIn PDF document text
    • http://tublitalia.fun/civil_case_information_statement_nj_form_f4r9ow.pdfIn PDF document text
    • https://vonebofakakare.weebly.com/uploads/1/3/1/8/131856314/fevido.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445877/normal_6004854f1f692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500425/normal_601d4cecd39f2.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/eVgjthb/besojo.pdfIn PDF document text
    • http://rating-bookmaker.ru/pdf_measuring_tool_ipad9jkjh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462362/normal_60232ea08e660.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD91 5132 bytes
SHA-256: fd7ff98cbeb834e3fbca6c5174aec2ef55c7a7b668dc51f383b6adb9a8241539
font_01_sfnt_off0000ef16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF16 11616 bytes
SHA-256: fbbd4231ab313ea78cc7b561238a44a57bbb3a82f2a04ea6cfe70710e88d50c9

Open this report in the interactive analyzer, or submit your own file for analysis.