Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db6d50165c95a92…

MALICIOUS

PDF

101.8 KB Created: 2021-03-29 23:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: eeb36cfbaad2938ec0e6ca93b7b5b9e4 SHA-1: 571624b082263df4401af70717e418bcd2208b40 SHA-256: 7db6d50165c95a922e82e408fe921862d67e3bb528e8aef0de9886fd0b890176
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to disposable domains, which is characteristic of phishing or malware distribution campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/aws?utm_term=what+is+the+meaning+of+self+reliant PDF link annotation
    • http://vowitufafuzebil.scienceontheweb.net/stoner_john_williams_espaol.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/biology_10th_class_book.pdfIn PDF document text
    • https://figagukedeliv.weebly.com/uploads/1/3/4/0/134040575/lurolejira.pdfIn PDF document text
    • http://good-production11.site/delonghi_portable_air_conditioner_owners_manualctbwd.pdfIn PDF document text
    • http://dipewafotowagu.22web.org/37031828980.pdfIn PDF document text
    • http://mx50off.pro/karome0chmc.pdfIn PDF document text
    • https://revejoduxu.weebly.com/uploads/1/3/4/2/134266419/3284209.pdfIn PDF document text
    • https://ginufadep.weebly.com/uploads/1/3/4/6/134668932/mafafenujetoxisareg.pdfIn PDF document text
    • http://kaxavetaxudu.mywebcommunity.org/8877491274.pdfIn PDF document text
    • http://motowifenizemuz.22web.org/67784185959.pdfIn PDF document text
    • https://vepezoroz.weebly.com/uploads/1/3/4/6/134605761/mubixalozaxusewetoje.pdfIn PDF document text
    • http://guxabena.22web.org/stop_bang_sleep_apnea_questionnaire.pdfIn PDF document text
    • http://retenenu.iblogger.org/gumidumasu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vomalowo.epizy.com/sci_hub_chrome_extension.pdfIn PDF document text
    • http://suduxegowur.onlinewebshop.net/uncle_mikes_sling_swivel_installation.pdfIn PDF document text
    • http://vunolipatebaw.rf.gd/what_is_url_for_google_search.pdfIn PDF document text
    • http://kuvonukuwe.epizy.com/ropepisixojasiw.pdfIn PDF document text
    • http://dunizolosonon.rf.gd/spondylolisthesis_radiology_report.pdfIn PDF document text
    • http://witesibezixu.epizy.com/berenstain_bears_thanksgiving.pdfIn PDF document text
    • http://nodefojabotozij.rf.gd/11315846643.pdfIn PDF document text
    • http://rivadejupogutun.epizy.com/sanawukixavu.pdfIn PDF document text
    • http://zexizel.epizy.com/sejetapopegodinasem.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_off000140f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F9 3368 bytes
SHA-256: 22555b6b7a0874c359aec2191b0ea4a4e8ea72ce298250233f34468753662dd3
font_01_sfnt_off00014d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D15 5196 bytes
SHA-256: b83147337cd4ba34801803fb8bf0e6c3d36e380db0f15da91ab8570cf56675ce
font_02_sfnt_off00015ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EA0 12748 bytes
SHA-256: ad2a83918571769fbd7e47e8fbb254232e36ca8e21979c3a0656404330e4529b

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