Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3decdf3fd2e627…

MALICIOUS

PDF

104.4 KB Created: 2021-02-13 16:57:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d9a07e2b0fb351cb30c915a034df894d SHA-1: 243111bc3cbd1967411359617615ddd4291bfe6c SHA-256: 7a3decdf3fd2e6279fc0fba40dd428e080bd6faad76d32ae4b18ec58f8595314
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure for downloading content, likely to redirect users to malicious sites.

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://jottigo.ru/wix?keyword=sword+art+online+manga+pdf+download PDF link annotation
    • https://danexuxubusam.weebly.com/uploads/1/3/2/6/132695747/428826.pdfIn PDF document text
    • http://bavedibigilomit.66ghz.com/certificado_medico_de_bolivia.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/hfghrgd/sas_zombie_assault_3_hacked_unlimited_money_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_601091c1acd53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_601dc87eb2097.pdfIn PDF document text
    • http://ylyn.ru/miwipeletewitezovidg34pt.pdfIn PDF document text
    • http://topsol.xyz/73098719617twi08.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/1G7jgB4/88431142531.pdfIn PDF document text
    • http://help-copyrighteamservice.com/tijovul5yemr.pdfIn PDF document text
    • https://cdn.sqhk.co/romafime/jgFjjgf/saturn_gutschein_media_markt_online_shop.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/hhehcgc/penalty_shooters_football_games.pdfIn PDF document text
    • http://zekabor.iblogger.org/75241988233.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dizogusuvi.rf.gd/34823672738.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/64215506446.pdfIn PDF document text
    • http://figaniver.epizy.com/xulojigofidifutozuzari.pdfIn PDF document text
    • http://dufogatate.epizy.com/bsped_recommended_dka_guidelines_2013.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_off00015d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D23 5376 bytes
SHA-256: 4b6919506cd2150f0fa8ecb94e721de60a12a7758a72049872fd018b70fd3a5d
font_01_sfnt_off00016f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F69 10704 bytes
SHA-256: b7c67d93cab5579b34a95479a63b54f45fb66db8e25e57fc479137d2c3b25047

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