Malicious PDF — malware analysis report

Static analysis result for SHA-256 2124381e6cb6bb95…

MALICIOUS

PDF

73.0 KB Created: 2021-04-16 00:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ae87f24552472503d73969cd643c2b76 SHA-1: 54755f93b06551120f9eefa5f223ede9dd575b33 SHA-256: 2124381e6cb6bb958196d412304846d8030125de5f2cb9ebc9e6f8119c0b165e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=zones+of+regulation+activities+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446390/normal_5fee94e40891e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478926/normal_605903ec34645.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/47883124303.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/ggLGAhv/virus_news_usa.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/lIgg87T/22623210220.pdfIn PDF document text
    • http://jelojutu.sportsontheweb.net/calculus_1_exam.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/hgghgcw/2745610656.pdfIn PDF document text
    • http://xafawotilujos.mypressonline.com/bakujoxotavuw.pdfIn PDF document text
    • https://cdn.sqhk.co/bokupajokim/QjhYPji/nba_2k20_locker_codes_january_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463803/normal_5fe92cd0eb34d.pdfIn PDF document text
    • http://amaryllis.space/the_canterville_ghost_summary_chapter_wise_questions_and_answersb0qyi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_602b64231017e.pdfIn PDF document text
    • http://xofelivigavas.mywebcommunity.org/skin_cancer_information.pdfIn PDF document text
    • http://togaxifobuf.mypressonline.com/4594029862.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/the_pact_book_jodi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496013/normal_5fcc54d2e1381.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/vikuwujulonuzuwuxudisirurop8f.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/wetevali/xulexosutozadudiwidab.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/ancient_china_and_japan_map_answers.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/singer_futura_ce-100__ce-200_software_upgrade.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_off0000df18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF18 5340 bytes
SHA-256: 1d61866e0076c91b7fe7cd9c538c09898293b234d143bd818605fbb6176ae87c
font_01_sfnt_off0000f161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF161 10932 bytes
SHA-256: 154d3467593c0887e618d345f5cbf9ca3e703b070b089b0220702614131797c0

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