Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55a9eaae7dcd8df…

MALICIOUS

PDF

71.2 KB Created: 2021-03-26 19:04:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2bcefee427460f97a00e9ee3976426c2 SHA-1: 112ba4782b547e91938409b31b4384a2e9ff2b55 SHA-256: e55a9eaae7dcd8dfd55be16bc1589cfdca470abb170c401a892991c99d9768da
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/123?utm_term=ayyappa+swamy+songs+free++in+malayalam PDF link annotation
    • http://tifoxikutawe.sportsontheweb.net/11081919337.pdfIn PDF document text
    • http://puveputado.sportsontheweb.net/plt_backbeat_fit_wont_charge.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/gi4Hagi/pemixapof.pdfIn PDF document text
    • https://cdn.sqhk.co/wudajelu/vhbdghw/xawelarirulig.pdfIn PDF document text
    • http://nemagufi.mywebcommunity.org/garmin_zumo_660_bedienungsanleitung_deutsch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/744a3fb6-4d54-461a-822a-8ef1711cf510/tilijunudunomunobuwor.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/books_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/accdc0b3-4626-4634-83fd-0d9f74e6d39e/integrated_chinese_4th_ed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a4f37a-4338-47ec-bfa2-9c13b0dd085c/zojirushi_cd-jwc40hs_water_boiler__warmer_4l_silver_gray.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_7660f0ac67ff4034a63662dfe0c93d43.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8b7fd7c-f6eb-45e3-99ff-c7ef578ff46a/kafovimo.pdfIn PDF document text
    • http://xifedesekelogu.epizy.com/guvoruniwetijixafowowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff81d46-512b-4490-8fe9-e3da62eb489d/47449621504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd920963-5d2f-4261-8da1-0cf17ac69cdb/36033416367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2178d62e-d716-40ec-ac06-da714db183c4/monsieur_ibrahim_und_die_blumen_des_koran_film_netflix.pdfIn PDF document text
    • http://mofomunor.rf.gd/zuvibuvuxisep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec39693d-7555-4a95-aaf4-4b54b0c9f977/gore_vidal_history_of_the_national_security_state.pdfIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_493f14780e8f491a898df599cfefffb0.pdf?index=trueIn PDF document text
    • http://kofukobekageja.epizy.com/algebraic_fractions_problem_solving_worksheet.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_off0000d51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51D 5404 bytes
SHA-256: f78473b61f689eb0a7951f46d4542c0b7d965fe5b59e2cb830a055298ccf757f
font_01_sfnt_off0000e78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78B 12012 bytes
SHA-256: c7974f18030de80fb5c86309abc1e2dbeb792410244d346c9b68a4fdcc6f1175

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