Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f809e27d3b69c6…

MALICIOUS

PDF

75.5 KB Created: 2021-03-12 13:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3f9a5ee827fcbba424c0f3b241374cb0 SHA-1: 5a6bb2231166c4e1afd1660cc78c21b2ed6b1dda SHA-256: 24f809e27d3b69c6b64ff11da95a3f34004b709a28e4e69922b6651a059ab424
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/wix?keyword=csit+3rd+sem+result PDF link annotation
    • http://vengriya.space/phd_student_cv_latex_templateeap0w.pdfIn PDF document text
    • http://shoes-storie.club/ps_i_still_love_you_songs_listvmfh0.pdfIn PDF document text
    • http://visionnew.xyz/zokesisijebalukatuzai32yv.pdfIn PDF document text
    • http://idealica-official.website/79242307594tv4x2.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/gerositusuvexoxuj.pdfIn PDF document text
    • https://cdn.sqhk.co/jonimaze/ZhcyKTJ/pukokivimira.pdfIn PDF document text
    • http://gepatoxax.iblogger.org/95824306702.pdfIn PDF document text
    • https://ponegibafuzixi.weebly.com/uploads/1/3/1/4/131406662/7096638.pdfIn PDF document text
    • https://cdn.sqhk.co/rotonoba/ZDG8jae/65252079988.pdfIn PDF document text
    • https://mumizajasaliso.weebly.com/uploads/1/3/4/5/134598274/varubaba-konizewixizesif-vazinoladupub-komotuxajazew.pdfIn PDF document text
    • https://waperimawomexav.weebly.com/uploads/1/3/4/7/134733778/f8717ac979b5b.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/vivolavoji_togogomosaxa_zukotovipawu_junuzido.pdfIn PDF document text
    • http://xonanudo.iblogger.org/dingo_habitats_worksheet_answers.pdfIn PDF document text
    • http://falutaburifa.iblogger.org/ccna_lab_manual_2018.pdfIn PDF document text
    • http://igcopyrightverify.com/email_signature_photoshop_template9p5y6.pdfIn PDF document text
    • https://cdn.sqhk.co/dodidubi/ju8hjjg/achena_atithi_full_movie_free.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedifi/0BXgdvZ/xiposupefuvud.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/8e4e574a-5520-48da-bd83-0bf38f8d74e8/aci_301-99_specifications_for_structural_concrete.pdfIn PDF document text
    • http://finunaji.rf.gd/togawixowapugudeziwimazo.pdfIn PDF document text
    • http://tijoduv.epizy.com/77859185328.pdfIn PDF document text
    • http://fitoripuxixanax.epizy.com/zepilojejakotojojadat.pdfIn PDF document text
    • http://pivutabomenatam.rf.gd/infusible_ink_transfer_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/822759dc-031c-4ad8-a43e-64396f8887d8/lumurisevixufaxutuzamekug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4bb0d17-60da-4590-8c35-67d872385085/61750628976.pdfIn PDF document text
    • http://lavemob.epizy.com/dixowedas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/895985f1-1afa-4254-a763-d67561ff667a/crossfit_open_training_program.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_off0000eb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4F 4828 bytes
SHA-256: 1f1c75f99f88a1ecdeb1bde56c1ea05159e60106760531e78e59b7ae6f6b3c54
font_01_sfnt_off0000fb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9F 11068 bytes
SHA-256: b33f9564e05a462a5d5c1179d155fc5712b65833610747018177662f02585166