Malicious PDF — malware analysis report

Static analysis result for SHA-256 c675d6bfeb6d22a2…

MALICIOUS

PDF

77.6 KB Created: 2021-04-27 09:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 47b022b5c4601360a01cfab3deb3d491 SHA-1: 29258d71e33042e413402ed5084bd029572d87fd SHA-256: c675d6bfeb6d22a26a01c03a267427b0a796f4e351c31d7e0c646b688a614605
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-10044375-0' strongly indicate a malicious intent, likely phishing or malware distribution. The ML classifier also flagged this PDF with high confidence.

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://resalured.ru/strik?utm_term=logo+design+app+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486200/normal_603d0fd54243a.pdfIn PDF document text
    • http://zowifupure.iblogger.org/fifomovozuvasifif.pdfIn PDF document text
    • http://techanomic.com/fomeguragewuxarijupukesae29eh.pdfIn PDF document text
    • http://cheatyou.site/38082297098zcdql.pdfIn PDF document text
    • http://wabexikorininaz.22web.org/cydia_substrate_deb.pdfIn PDF document text
    • https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/jogixavubam.pdfIn PDF document text
    • http://auth02mobility.com/how_to_oil_shark_euro_pro_sewing_machineoy68g.pdfIn PDF document text
    • http://medicinfo.online/fipodipejeregi7ngqp.pdfIn PDF document text
    • https://fodonisegijiwos.weebly.com/uploads/1/3/1/4/131437376/3411586.pdfIn PDF document text
    • http://shopeuro.pro/9541388354882kvx.pdfIn PDF document text
    • http://betmoy57.com/rap_albums_sitesmj053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_602ad2fc50d9e.pdfIn PDF document text
    • http://card2card.live/85623137048xkhuj.pdfIn PDF document text
    • https://sujegido.weebly.com/uploads/1/3/4/6/134695044/866599.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392441/normal_60188d24c7d09.pdfIn PDF document text
    • https://wuduzavuvavazi.weebly.com/uploads/1/3/4/6/134618101/nizupak_pajotasijale_juzipipuluzimav.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/27a8abc5-1cc5-4bb2-b4c5-11994141ab4e/movie_maker_for_windows_10_free_download_without_watermark.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5bb65f-2397-40c6-992e-b59a7422733d/crystallizing_public_opinion_edward_bernays.pdfIn PDF document text
    • http://jovigoxuja.epizy.com/werutavibosed.pdfIn PDF document text
    • http://tefesapebeto.rf.gd/grade_12_chemistry_textbook_nelson.pdfIn PDF document text
    • http://dukedofabi.epizy.com/wafikevowawuk.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_off0000f1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AD 5240 bytes
SHA-256: eb3c32f870dec19ef8055a7444cf8e7e559a8d2ca28c0a293fed900a0acadeab
font_01_sfnt_off000103ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AD 10640 bytes
SHA-256: fce99cc01760b6afdaace18a9b323f98b59fa01376b1cb6d12fdd5ebd99eeb14

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