Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ecdee441f0bfda…

MALICIOUS

PDF

69.0 KB Created: 2021-02-20 07:27:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 00dc1bfbcdf476ecad690c5776ee6ec9 SHA-1: 44cae20837572bb1525af45ae272e43a1179c936 SHA-256: 83ecdee441f0bfda735be93ffa4d19cf291903f149ac4c8fcaadcfe85fd3b2d5
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://crophysi.ru/123?utm_term=the+thousand+and+one+nights+quizlet In PDF document text
    • https://static.s123-cdn-static.com/uploads/4499656/normal_5fe1548868e94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484103/normal_6019768d41b46.pdfIn PDF document text
    • https://dopozigixojak.weebly.com/uploads/1/3/4/5/134509916/sasizur.pdfIn PDF document text
    • https://cdn.sqhk.co/tesinogopano/jdibiiD/paper_fold_heart_with_wings.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457296/normal_5fdfffd22ed88.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/8535163842oatwg.pdfIn PDF document text
    • http://kurs1.xyz/vanasetefesjx3k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476268/normal_5fd95b3d87743.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/Eiahjjo/cash_master_win_real_money.pdfIn PDF document text
    • https://ledajesaler.weebly.com/uploads/1/3/4/0/134041179/4697218.pdfIn PDF document text
    • http://helpverifybadges.com/banomiwxrnr.pdfIn PDF document text
    • https://cdn.sqhk.co/pelebitebi/V6gjigQ/anime_basketball_team_names.pdfIn PDF document text
    • http://sovetnik53.ru/maxatigevoxanemofnz2f0.pdfIn PDF document text
    • https://sizamuvexiluti.weebly.com/uploads/1/3/4/6/134644091/5f7949cb9fbe39a.pdfIn PDF document text
    • http://iranianvc.com/derilbyuy4.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_off0000d1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E7 5116 bytes
SHA-256: 46bae5a81df7b4a39c4618b027be1078930a33db12ad612d55fbc681c80be544
font_01_sfnt_off0000e347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE347 10516 bytes
SHA-256: cd6be86031e2f1f01a05fcbe6710aea320edd6af23c4c29eddf4abe16c2b33af