Malicious PDF — malware analysis report

Static analysis result for SHA-256 923e801ade3a5ea8…

MALICIOUS

PDF

82.5 KB Created: 2021-03-23 13:14:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a0a06e4bc703083187dd54e536b72ed4 SHA-1: 5c989ae77468dcf45d6a694246cf385d9cc30a04 SHA-256: 923e801ade3a5ea8d3b72e1574c18ed80930c128ad3359762910f33bcceee16f
186 Risk Score

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 0.9994

Heuristics 6

  • 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 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://xezojetit.ru/wix?keyword=digital+mixer+x32+behringer+manuale PDF link annotation
    • https://lufeziwupidel.weebly.com/uploads/1/3/5/3/135345985/lazidijeje.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/87662354558.pdfIn PDF document text
    • https://vamarimorojikav.weebly.com/uploads/1/3/4/6/134640123/4033462.pdfIn PDF document text
    • http://tugeredenazej.mywebcommunity.org/digital_electronics_viva_questions.pdfIn PDF document text
    • http://tikanaw.mypressonline.com/sex_and_the_city_drama_queens_cast.pdfIn PDF document text
    • http://rowaxamapitowej.getenjoyment.net/what_are_the_safe_areas_of_new_york_city.pdfIn PDF document text
    • https://vekeliludodim.weebly.com/uploads/1/3/4/7/134745250/6967401.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/abf069.pdfIn PDF document text
    • https://jaxedafotonomut.weebly.com/uploads/1/3/4/8/134885779/9f342a1e480.pdfIn PDF document text
    • https://finenomasawovep.weebly.com/uploads/1/3/1/4/131437785/3f727.pdfIn PDF document text
    • http://believes.space/descargar_libro_pon_el_cielo_a_trabajarp6u0v.pdfIn PDF document text
    • https://dapoxegimore.weebly.com/uploads/1/3/0/9/130969679/7045245.pdfIn PDF document text
    • http://1ux.site/tet_paper_2_psychology_study_material_in_tamilks5fm.pdfIn PDF document text
    • http://gomijexa.mywebcommunity.org/61086670545.pdfIn PDF document text
    • http://mon-cmso.best/tumuxarujulodefenujarires3e490.pdfIn PDF document text
    • https://xudagemiribu.weebly.com/uploads/1/3/1/3/131378943/junatexufame_kadezamaj_sovutidoseg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zotixawip.epizy.com/list_of_rangers_apprentice_books.pdfIn PDF document text
    • http://fuguduvuduwir.epizy.com/3_column_word_template.pdfIn PDF document text
    • http://baroputufusu.rf.gd/bilotodej.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/how_is_aliyah_pronounced.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/fifty_shades_freed_cast_bodyguard.pdfIn PDF document text
    • http://joriboka.epizy.com/7761411881.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/what_college_should_i_go_to_for_interior_design.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_off00010384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10384 5424 bytes
SHA-256: 78c65b5a721b75211438a301749c523e1705c8aa372469a8277e2cff68af29ac
font_01_sfnt_off000115dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DC 10832 bytes
SHA-256: 2d4f6666185d986355d3a92fc2116b4d7f11910c4054a2aeaf713ccbb0f2108a

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