Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a4801274093c7e7…

MALICIOUS

PDF

67.6 KB Created: 2021-02-17 23:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e5e9cb3f68f6d5e9d7368383e08ae68a SHA-1: e6f98ccec85c78dec5a3e2cd25e255eb592637e6 SHA-256: 7a4801274093c7e79aa6bca2eaa250a7c6fbefe4bd02c07a0e155c46cadb7961
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support this, indicating the document is designed to redirect users to potentially harmful sites.

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
  • 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://baarspo.ru/wix?keyword=partes+de+la+celula PDF link annotation
    • http://mon-compte-cmb.best/870874525818e0hj.pdfIn PDF document text
    • http://bankrot-biznes.ru/bengali_movie_song_audio0vgpt.pdfIn PDF document text
    • http://levantegroup.net/sumanunanaxoned05ht3.pdfIn PDF document text
    • http://wefigofozotime.22web.org/installation_qualification_template.pdfIn PDF document text
    • http://agencymedia-ig.com/29165235294tpw0w.pdfIn PDF document text
    • http://gifozizonumili.iblogger.org/indycall_app_free.pdfIn PDF document text
    • http://proita.space/kogorikijrskt.pdfIn PDF document text
    • http://originalhallyu.com/d-link_dir-615_admin_username_passwordqepnd.pdfIn PDF document text
    • http://ndfnasg.xyz/pathfinder_summoner_guide9gmv9.pdfIn PDF document text
    • http://world-wildshop.com/systemverilog_queue_find_indexisn1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://diwuvugu.epizy.com/54010838663.pdfIn PDF document text
    • http://zosenesewil.rf.gd/best_stock_wallpapers_app_android.pdfIn PDF document text
    • http://supikovibamukip.epizy.com/budget_vs_actual_excel_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/aboriginal_art_symbols.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/free_learning_sheets_for_4_year_olds.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/83357982487.pdfIn PDF document text
    • http://juvofirodeburu.epizy.com/42507357694.pdfIn PDF document text
    • http://rezolilifuk.epizy.com/birthday_background_images.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_off0000cc00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC00 4936 bytes
SHA-256: 83fcb221000b0b37b8797aba0225ae70cf57cd7ce02f7d9302a5eb8c5482b42c
font_01_sfnt_off0000dccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCF 10856 bytes
SHA-256: 8c535e74df4d5c11772d46487c0f1a20d566ac7da0e9279866f0a8606856508a

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