Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4cee66a9e16d8a…

MALICIOUS

PDF

78.7 KB Created: 2021-04-23 18:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9fe7a367eb42ba208e76c4c8950a6278 SHA-1: d7475d9c3cc6dc4e574459dfc82fb0791f23d2cd SHA-256: fa4cee66a9e16d8a08ea8a8e769578846d1f345845e4c7a1d9a2a6018f37e99f
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses an urgency-based lure. 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 0.9997

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=antennas+direct+clearstream+2v+uhf%252Fvhf+hdtv+antenna PDF link annotation
    • http://naturfresh.fun/concepts_of_database_management_9th_edition9td03.pdfIn PDF document text
    • http://nuzabokazovuwa.iblogger.org/buvinolujefimopali.pdfIn PDF document text
    • http://forkidsshop.online/beatport_er_hack_v1._5_free1g9p6.pdfIn PDF document text
    • https://cdn.sqhk.co/dorodidur/hjxvjcf/miranda_kerr_home_line.pdfIn PDF document text
    • https://cdn.sqhk.co/vinikawikuve/ajjIhiS/fruit_mania_2_apk_download.pdfIn PDF document text
    • http://varistop.site/netuludilajemegevasesi59eaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_605c3b42e52e7.pdfIn PDF document text
    • http://sqrab.top/xikujokumolitrwhan.pdfIn PDF document text
    • https://cdn.sqhk.co/rajexizeba/hbhbGMY/7637955373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5fe8902e02b1f.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/aiibhh2/rebisal.pdfIn PDF document text
    • https://cdn.sqhk.co/monazaxumol/Hjbjahh/cmyk_color_chart_free.pdfIn PDF document text
    • http://sepuwazedano.iblogger.org/25186102707.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/eGCjaaC/ducks_unlimited_calendar_2021.pdfIn PDF document text
    • http://kixogabes.22web.org/aula_2_curso_de_espanol.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/hevFPaG/puninagiveluwuvasidexo.pdfIn PDF document text
    • http://uaregroup.com/what_do_you_have_to_do_with_social_security_when_you_turn_65pu8pb.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/908849e8-1b40-460d-a150-801e0e7bbc91/matlab_loop_over_matrix_rows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77f0365c-4c98-4abe-bb0d-4ba183be74d0/graco_milestone_car_seat.pdfIn PDF document text
    • http://bagajose.epizy.com/16913682817.pdfIn PDF document text
    • http://ruxezila.epizy.com/68036174898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbccb904-d204-4e22-98d9-87bc9abfe3c4/vixupokomuwi.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_off0000f2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D1 5480 bytes
SHA-256: 2f9e8628b9cf0759aa3545b39746796312731ed3938b8f76892040ed754eddcc
font_01_sfnt_off00010559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10559 11596 bytes
SHA-256: 257b86a2c63bc52eee306bfd16e953ad03a64283eaf9b6c5b697ec77f317b7ad

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