Malicious PDF — malware analysis report

Static analysis result for SHA-256 be32492294e141f8…

MALICIOUS

PDF

77.1 KB Created: 2021-03-02 15:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 091811cd9ab4655c463e1c91102615f1 SHA-1: 786d7057f3da1545d20531a74fd3d292f0851b75 SHA-256: be32492294e141f812ee677afb0f416b4711dfd09106ca2e6b3b98ae744a9fd0
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable hosting, indicating a link farm designed to redirect users to malicious or phishing sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing lure.

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=free+guitar+tab+book+pdf PDF link annotation
    • http://natural-shop.info/contractions_worksheet_grade_6b596u.pdfIn PDF document text
    • https://dosujuge.weebly.com/uploads/1/3/4/3/134305565/jegiditejukijo.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwilaj/hds2rjP/zopituzexoxatis.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/trigonometry_formula_right_angled_triangle.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/48366199473.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/lg_wireless_headphones_for_smart_tv.pdfIn PDF document text
    • http://senteber.site/juginagemavilq70f4.pdfIn PDF document text
    • http://delayikapy.xyz/12378589108s2tkj.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/wivupilu.pdfIn PDF document text
    • http://creditreportfast.info/bemurupudulezoposorb3obo.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/texas_cdl_air_brake_test_stepshujwv.pdfIn PDF document text
    • http://3bki.ru/66263366431069ws.pdfIn PDF document text
    • http://kolomata.ru/what_is_the_meaning_of_accommodation_bill_of_exchange949m4.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/10140510658ro5m1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kakasis.onlinewebshop.net/music_an_appreciation_11th_edition.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_off0000f183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF183 5160 bytes
SHA-256: dea532e4f693d36990284fa55832911f976c49b2447da1038f3432855d8cad1f
font_01_sfnt_off00010327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10327 10928 bytes
SHA-256: 1248515520966f9aed44c5d02cc21d7afa8bb913c2a55be23c60141c5be81f84

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