Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3577c7859c6efef…

MALICIOUS

PDF

117.1 KB Created: 2021-04-05 18:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 740d2ec686e7553a7941dd2561c0c28b SHA-1: 2260565f49a5d45fbd87ea800294869440d60995 SHA-256: d3577c7859c6efefbb1b146abef571a26f7e8f84b86ac4b1896e17510afb8d11
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs, despite the lack of explicit script content, strongly suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=opticover+ac1200+wifi+extender+manual PDF link annotation
    • http://kizefet.iblogger.org/ableton_push_2_manual.pdfIn PDF document text
    • http://trokot-shopnew.online/bezosudadulalutbptoa.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/notasi_ilmiah_dan_angka_penting.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_605fa529c2ca5.pdfIn PDF document text
    • http://bozidik.22web.org/sonny_s_catering_menu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485310/normal_604718ec563d7.pdfIn PDF document text
    • http://outputqwvk.space/kijoputevasegirarivjafb.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/physical_science_study_guide_grade_12.pdfIn PDF document text
    • http://denazofumoxebo.iblogger.org/26586037091.pdfIn PDF document text
    • http://ersoil.fun/python_project_topics_githuboadu0.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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://fetufebutegiv.rf.gd/certificate_of_required_attendance_form_louisiana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4fafc4c-fedc-4b7a-81a2-15d043aa4053/is_harry_potter_movies_on_amazon_prime.pdfIn PDF document text
    • http://sivonimowonaze.rf.gd/38881856928.pdfIn PDF document text
    • http://pakapenabu.atwebpages.com/clock_aptitude_tricks.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/sony_xplod_600w_4_channel_amp.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/gapejusafodamifo.pdfIn PDF document text
    • http://fumibilulad.atwebpages.com/25821925420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc18bc99-67dd-4d00-9c4b-667633997349/directv_tower_blinking_green.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/47556026376.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000175e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175E9 1528 bytes
SHA-256: 8678461a36318f73caa47be7720532798183d8a18b717e055a12ae2b3be44fb2
font_01_sfnt_off00017db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DB0 5576 bytes
SHA-256: 356622829654b28069aaeaa2ee495225fbd7414ea85cd25c9edaa5952fd77184
font_02_sfnt_off000190a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190A5 11568 bytes
SHA-256: 0c539eb768e53e8298131f5773d62e53956938efeb93bb709a7609cbf6430cb5
font_03_sfnt_off0001b802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B802 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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