Malicious PDF — malware analysis report

Static analysis result for SHA-256 caebdb8df6461af3…

MALICIOUS

PDF

83.8 KB Created: 2021-09-12 11:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f8b239a100aa75eaca6d99d2d4676f53 SHA-1: ce47028831aae368babd6ee85d0bfaa00423a27e SHA-256: caebdb8df6461af390d043b9d81f9e6473df5b3f54c4cbce393e6a7309c75623
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple PDF link farm heuristics confirms the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://ticaproduce.com/ckfinder/userfiles/files/valapisaxoriwuzewomafarof.pdf In PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16131020a83b0a---96807181544.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/garifinumupemet.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/46689267033.pdfIn PDF document text
    • https://propage.q-cloud.net/upload/ckeditor/pages/files/zodewiputaziv.pdfIn PDF document text
    • http://orosweb.hu/userfiles/file/86647592166.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/roxodujagataduw.pdfIn PDF document text
    • http://zoscm.zohukum.com/ckfinder/userfiles/files/kasutamalafiwatezewone.pdfIn PDF document text
    • http://sydjpg.com/images/upload/file/20210904_041019_196.pdfIn PDF document text
    • http://iehyun.com/editorupload/file/fexunigevujanipapej.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/runilesupifage.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/jibiturukajilevetefus.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/52851782553.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/memuxo.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/susapidorosewifeninuvaz.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/92734525612.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/ac20c775753124a3cc44371af88f07fe/98592721053.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/34494713957.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/97091193080.pdfIn PDF document text
    • http://alcantara.cz/data/file/zuramumi.pdfIn PDF document text
    • http://pnc21.com/files/fckeditor/file/1964344763613630c410d43.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388a3d17400---jopur.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/191598540.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/kalisupexotebenanur.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/191816485.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=mx+player+pro+mod+apk+latestPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000def6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF6 10660 bytes
SHA-256: 1953c1c08f637a573c0acd55816f782b12f6c51bd48be9204cab66a77b0efe49
font_01_sfnt_off0000f78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9E 19000 bytes
SHA-256: 7fd158689e5fdfcadf75071f9740085a8e0f1f1baafcd0ac85a84c4611ccfaf6

Open this report in the interactive analyzer, or submit your own file for analysis.