Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e645ee49f9c00a7…

MALICIOUS

PDF

102.7 KB Created: 2021-09-02 15:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 93857e2b2eed26f146b97b044a53c50d SHA-1: 5060f4f69ba9a4bc8a8dbad6fd751fb6e6c1236c SHA-256: 0e645ee49f9c00a795b9faecb435d2e66e0d97c38b85b24bcc8cd8854e3f21d8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The primary goal appears to be directing users to external, potentially harmful, web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • 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://bluecars.pl/userfiles/file/wuzaramuvu.pdf In PDF document text
    • http://tingyi-bnb.com/CKEdit/upload/files/jedinegaz.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/752772383b803e961dbc9c783f8b40a0/rikuliritel.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/11552466863.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16080e10158452---42222788249.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/bc0f7bc10d7bf6063470279d737173da/90558981876.pdfIn PDF document text
    • http://khachsanmyngoc.com/upload/files/tedakixemarelu.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/duvematanuvobujop.pdfIn PDF document text
    • http://riverhouse.at/pcms/content/file/5364108634.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/67576244658.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16100a235e7a14---8504601413.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be0c4f7fb53---siwedesiz.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/90348957086.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073ea81b6384---94512015276.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/67224909713.pdfIn PDF document text
    • https://nadamasristorante.it/file/25071262237.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/68930719265.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/luxesidapoguxoketiwun.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/161085968b7d5b---jadapibupiv.pdfIn PDF document text
    • http://sbairs.com/datas/files/puwemozepedokatotuwozun.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/43705048566.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/widapunawonepukeves.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160cb85df484a2---simajozemekifusukutesubon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=asme+section+viii+division+2+2013+pdf+free+downloadPDF 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_off00012be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE9 17544 bytes
SHA-256: 847f1dc3cfa972816410ab7414b3fba36bb1f84519794097b8d776e4bb201a6b
font_01_sfnt_off000159ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159AC 11380 bytes
SHA-256: 3ff01cf6b8b8c4011b761f04cd5adb5fe78200a73dfb84214de1086f015f20e5
font_02_sfnt_off000174ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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