Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2b6f7eec4d5c28…

MALICIOUS

PDF

78.0 KB Created: 2021-03-04 00:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5b4ddc4f01eb7ef22ff559d30db85829 SHA-1: bd8edbd981f21481692a5dd5aebe9ba1e9309d03 SHA-256: ce2b6f7eec4d5c282e28ad2deebc410a09ee94b9cfcd59d527c9afaa053c07db
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm and by ML classifiers as malicious. ClamAV also detected it as a phishing trojan. The presence of external URIs and the link farm heuristic strongly suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

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://resalured.ru/wix?keyword=chapter+9+assessment+chemistry+answers+glencoe PDF link annotation
    • http://pet-guru.shop/zokimirasufalivqe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_602599b1a4277.pdfIn PDF document text
    • http://supsun-aero.com/oracle_sql_group_by_concatenate_text5pd4j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366653/normal_5feb50b79ac8a.pdfIn PDF document text
    • http://ruperamumafuvaz.22web.org/corsair_k95_rgb_platinum_xt_review.pdfIn PDF document text
    • http://kugenezajiz.22web.org/29534014230.pdfIn PDF document text
    • http://zemegazi.22web.org/aap_infant_feeding_guidelines.pdfIn PDF document text
    • http://my-favshopg.online/naruto_online_trainer_v1._5i8y1c.pdfIn PDF document text
    • http://puzijebiwukixi.iblogger.org/are_benelli_and_stoeger_chokes_the_same.pdfIn PDF document text
    • http://richteam.site/kesukoc27r3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kesekerezox.epizy.com/12013835208.pdfIn PDF document text
    • http://dogazuzi.epizy.com/animals_tamil_dubbed_movie_tamilrockers.pdfIn PDF document text
    • http://fefomuk.epizy.com/mebaxawiredu.pdfIn PDF document text
    • http://morufigalolo.rf.gd/8183248025.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_off0000f485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF485 5600 bytes
SHA-256: e1e3b1cc2319f272902bb6a77b489faaef5eb9ac5b3c4ee9c0deb4b00c41be9e
font_01_sfnt_off00010778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10778 10248 bytes
SHA-256: 93f6ca95940c2b3f8a6fd936d763559e932f81f7af1fafc8599602040fdfdb48

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