Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ec256af3ae38ee…

MALICIOUS

PDF

80.5 KB Created: 2021-03-15 02:06:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5ecf7d10038febbc14eebaefdabbead7 SHA-1: 3468a2a47a22fd7753bfdd6b0dbdf564ea3964a1 SHA-256: 32ec256af3ae38ee307d9b2900e706ac11952f4142a671d396e2d57e5c12cbc7
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://pelibifir.ru/strik?utm_term=king+bolete+recipe PDF link annotation
    • http://ccckkkkk.space/84282193282takx3.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/acca_f9_text_book.pdfIn PDF document text
    • http://legumajati.22web.org/73859203275.pdfIn PDF document text
    • http://rexuwoxaga.sportsontheweb.net/spectrum_math_workbook_grade_6_answer_key.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/rapagafoxudev.pdfIn PDF document text
    • http://negedibomul.sportsontheweb.net/54795794559.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/novatel_mifi_6620l_batterydlq6p.pdfIn PDF document text
    • http://uniques.space/meaning_of_budget_line2l9h6.pdfIn PDF document text
    • http://babysampler.com/9662773026n3d7d.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://bixozebaxikapos.atwebpages.com/80772594505.pdfIn PDF document text
    • http://pivirujifija.epizy.com/lukudimodabavajijevene.pdfIn PDF document text
    • http://kafogateginoni.epizy.com/kobitevape.pdfIn PDF document text
    • http://fulawumobolofog.epizy.com/46881842821.pdfIn PDF document text
    • http://xedemigu.atwebpages.com/59103238827.pdfIn PDF document text
    • http://gexovudin.rf.gd/multigrain_bread_nutrition_information.pdfIn PDF document text
    • http://dopodisimedu.epizy.com/botellas_decoradas_manualidades.pdfIn PDF document text
    • http://zivonupawidam.atwebpages.com/61900392749.pdfIn PDF document text
    • http://lesodabat.epizy.com/angelica_hale_symphony_performance.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_off0000f36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36C 4612 bytes
SHA-256: 7d09163cf336367cac28c36042662276f0058a96199e6af2a35f9b0476bb7d5c
font_01_sfnt_off00010321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10321 10532 bytes
SHA-256: 1ab6eff59a7e676fe5560508b60d6148d57a65b1d1fd242dfc49dfccdb7e31ed
font_02_sfnt_off0001271f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333