Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9cdf1922c9c5a3…

MALICIOUS

PDF

87.1 KB Created: 2021-01-23 21:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 453a4cc060bed2aef4e4d508d7c5b4c8 SHA-1: 7405d2db19f42b98f5616e4c55e83e2b6efcf8f8 SHA-256: cd9cdf1922c9c5a3c2315e6cf0aaebf0404162f60850971bb7cf71224f81a479
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a tactic often used for phishing or distributing further malware. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic specifically flags this behavior, indicating a malicious intent to obscure the true destination or host a large number of links. The ML classifier and ClamAV detection strongly support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=brighter+image+lab+google+reviews PDF link annotation
    • https://fesinukovib.weebly.com/uploads/1/3/4/7/134715349/simasagejitob.pdfIn PDF document text
    • https://joriwonakogilul.weebly.com/uploads/1/3/5/3/135305945/zegivewoj.pdfIn PDF document text
    • https://funopazotasar.weebly.com/uploads/1/3/1/0/131070342/bagalakaxataku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365628/normal_5ff48ff74a346.pdfIn PDF document text
    • http://rebituzugofebo.22web.org/78083076895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408481/normal_5fe966b03a67e.pdfIn PDF document text
    • https://site-1176697.mozfiles.com/files/1176697/lorofasoga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://valamujunitun.epizy.com/pig_castration_procedure.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/jessica_soho_reports_episodes.pdfIn PDF document text
    • http://xugonowelimije.epizy.com/rowdy_baby_song_status.pdfIn PDF document text
    • http://sasitegeke.epizy.com/54581485691.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/film_analysis_essay_guidelines.pdfIn PDF document text
    • http://natadomemorad.epizy.com/7519886859.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/58064576454.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_off00011404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11404 5440 bytes
SHA-256: 34236e6431ae28112ccaa24b612795a47bec2da109a32e1bba3a79ec12e260b6
font_01_sfnt_off0001266c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266C 11528 bytes
SHA-256: d73eb5e8e7d1b5450143dd63c4a26e38d40a103b100b459394e207158c083f3c

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