Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ff7603369e2002…

MALICIOUS

PDF

79.0 KB Created: 2021-03-13 18:28:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fdb776cb8284ee786a18ac1f59e3f40f SHA-1: 953c352e07a6d1e5ac8fb9f98c2c400dbda0f33d SHA-256: 04ff7603369e200223c3c5dea297227eec3c01a8152ed407461d692023d2078b
126 Risk Score

Malware Insights

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

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 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://dugedepap.ru/123?utm_term=kelly+clarkson+show+episode+guide PDF link annotation
    • https://xakalawuvobovu.weebly.com/uploads/1/3/1/0/131071286/fe71b06.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/samsung_refrigerator_rf26hfendsr_aa_parts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465396/normal_6001497da5b13.pdfIn PDF document text
    • https://jimedugevebuz.weebly.com/uploads/1/3/4/4/134437071/dotaf.pdfIn PDF document text
    • http://pusovemolexed.scienceontheweb.net/zatezevusiwijugetumi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366354/normal_5fed1e35b1e57.pdfIn PDF document text
    • http://gasiwine.iblogger.org/52655843589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_604868640a578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416327/normal_602116f26ea02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426677/normal_5fdd60032e5f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bowegasobufur.myartsonline.com/fefif.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/xixoxonasonozavuwela.pdfIn PDF document text
    • http://gazugitub.epizy.com/android_goodies_shop.pdfIn PDF document text
    • http://libizokize.rf.gd/22543905952.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/14288619232.pdfIn PDF document text
    • http://bozexobasunuz.rf.gd/debanazalavogo.pdfIn PDF document text
    • http://depabisogonab.rf.gd/37381185201.pdfIn PDF document text
    • http://golofup.rf.gd/web_development_courses_for_beginners.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68B 5364 bytes
SHA-256: 50cd623c85dca252b46274b7f8e672f5faf6c2622ae52fc9fd2554cae637ce89
font_01_sfnt_off0000f8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CA 11200 bytes
SHA-256: 3e1a965ee81dfc82c0553ff3f4fe1db8d63d1310e57bc42a529ced51bff32007
font_02_sfnt_off00011f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c