Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9626fd8a9a29fb…

MALICIOUS

PDF

77.4 KB Created: 2021-03-29 18:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b60163a7e4e66bf350a754eeae1ffa32 SHA-1: 02a10f07e9200aed7891e352f372129f44ab1951 SHA-256: 4a9626fd8a9a29fbca950a39f178ab83ed27298aa6a21ae69b0efc665961a816
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. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/wix?keyword=vector+to+array+c%252B%252B11 PDF link annotation
    • http://bagomebefekixob.getenjoyment.net/clinical_examination_in_cardiology.pdfIn PDF document text
    • https://romagazep.weebly.com/uploads/1/3/4/7/134759296/28939babd018.pdfIn PDF document text
    • http://shoplus.info/7004560336at958.pdfIn PDF document text
    • https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/nezurubuxite.pdfIn PDF document text
    • http://datingdate.site/70242523456ydn6m.pdfIn PDF document text
    • http://cardioactiveuficiale.site/what_does_service_economy_mean_in_businessjnmys.pdfIn PDF document text
    • http://brandframeb.com/foxosudegifituretomertp4r.pdfIn PDF document text
    • http://cocobuka3.xyz/deduduvaledafowuzibahyba6.pdfIn PDF document text
    • http://omynutural.space/macroeconoma_olivier_blanchard_danipjeun.pdfIn PDF document text
    • http://belofakomag.mywebcommunity.org/1666172542.pdfIn PDF document text
    • http://idealicaitaly.site/gimp_2.8_tutorial_for_beginnersd93xe.pdfIn PDF document text
    • http://lavka-karamel.ru/international_accounting_standard_21r5voi.pdfIn PDF document text
    • http://leftoutclub.com/siruxapuvunososijabljx78.pdfIn PDF document text
    • http://kibesamifi.getenjoyment.net/biografia_de_augustus_de_morgan.pdfIn PDF document text
    • https://bujozimadepaxed.weebly.com/uploads/1/3/4/6/134615651/2350290.pdfIn PDF document text
    • http://leririv.sportsontheweb.net/is_billy_elliot_on_netflix_canada.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/9b34823f-d61a-478d-b5f1-855b2090333c/swiffer_wet_jet_coupon_walmart.pdfIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_3987ce5a4bed49f49d4134163cd33b54.pdf?index=trueIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_402faccb0b3143309384387a5f55e380.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3700eeb5-4026-4aac-baec-fb7d9a6e5645/73737584252.pdfIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_aba99db9ca2f47ada624c1c667e1dfb5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d98d4c9a-6af4-4598-8189-9dfd51dd2a67/puwakisiluv.pdfIn PDF document text
    • http://beliraguw.onlinewebshop.net/case_study_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f6656d-ba8c-4c53-8e9b-894a22c89d7d/what_is_management_information_systems_careers.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_off0000eed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED0 4700 bytes
SHA-256: afe06b21eb7de741afac77ba514b0d2c27d367e8da04d8ed05afac3006621768
font_01_sfnt_off0000feed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEED 11752 bytes
SHA-256: 75f8fc640fbc03ad9d842565baa998ca6f44b908bb4408e5adcac6451ce6fd77