Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1debf68d419513…

MALICIOUS

PDF

79.0 KB Created: 2021-03-24 15:18:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7f2ff12a25fdce448024fac000d2abaa SHA-1: 35820242eb3b84bd06c4c3646d271b0f35a63548 SHA-256: ec1debf68d419513c65bbdc2394f7d611176331af18b22d1d1d9508dbce04e7b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites, likely as part of a spearphishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/wix?keyword=heritage+park+estates PDF link annotation
    • http://lexukugeru.22web.org/11281721251.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418401/normal_5fce5e8ead59a.pdfIn PDF document text
    • http://biomaniix.website/42950679892zq7ml.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413982/normal_601764df0817b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476925/normal_603b7c3b87a66.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/jiTahfu/79032143641.pdfIn PDF document text
    • https://cdn.sqhk.co/tuminageka/z04jgjd/childrens_words_that_begin_with_gr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4526930/normal_6040fbaf66963.pdfIn PDF document text
    • http://davizaxokekibe.iblogger.org/53737338834.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449603/normal_60387f0be101a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450517/normal_6040350e89b73.pdfIn PDF document text
    • http://figedizizexi.22web.org/bases_and_acids_worksheet.pdfIn PDF document text
    • http://getfreecreditreport.info/56425363454hs9fh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390055/normal_60218928c5a92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404955/normal_601f7b82ea35e.pdfIn PDF document text
    • http://probkin34.xyz/dotujulokowizakitw3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481397/normal_601b8d10c724b.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/40a5ed1d-dedd-4db8-a923-80c19ef39bd1/78740782280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59f84ed7-8257-4499-8adf-466e609cc74f/que_es_autorretenedor_de_impuesto_sobre_la_renta.pdfIn PDF document text
    • http://godutiliwaganos.rf.gd/civil_case_information_statement_nj_appellate_division.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1dcdcfb-aaff-461b-8077-08758091469d/16654841712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a59f0e2-be72-4309-a819-8316d50f4c33/boraf.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE211 4980 bytes
SHA-256: 5d346036089853d3892032035c0602fb58f34f1f8290847a41d9504bf6464c11
font_01_sfnt_off0000f314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 11228 bytes
SHA-256: 2ba03208249bb94c14b63045b688fdc7e19252556828ffdaec65ab0cf752b258
font_02_sfnt_off00011982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11982 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15