Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b5b30489496e02…

MALICIOUS

PDF

82.5 KB Created: 2021-09-05 03:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 783cb791a27e5aa4330b47c0df1c3582 SHA-1: 3f69d67bea5964c049662c81870802d6f4fad3e6 SHA-256: d0b5b30489496e028f687c5f767411976f8991b6d8c81bf72eae88de131b703a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The document contains a link farm pointing to various PDF files hosted on potentially compromised websites, suggesting an attempt to obscure the true malicious destination. The presence of the 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security scanners.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://keralabiblesociety.com/fck_uploads/file/45309022342.pdf In PDF document text
    • http://geniuschulatutor.com/userfiles/files/welopifenonezuvur.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/litidezibebej.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c15a55ea99b---35712776814.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/jenela.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbb5e119bb---vedizekizali.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/57306563906.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/87686790198.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/45563678531.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/ketuged.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/doserojuzexobekatirunir.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/49597847894.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/fb2892c3b183688438b7900994787b26/guxevixibu.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/67057060499.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/siluzosevo.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082017a1a71d---wiferevuwutumudemasivomer.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/7ss5o06rnvscebda40o4k1o3g1/vunebaruwiwu.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608860023a4da---kasexenoxe.pdfIn PDF document text
    • http://dmscsmartlifeblog.com/userfiles/files/sasaxezosinajeseb.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c54b0aee514---mulavavusovikajovopa.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/ha0qcvp0u6590qkt7akbairnu3/lawurodixokugawituvidel.pdfIn PDF document text
    • http://derp74.fooden.com/UserFiles/files/vivuwuxumotabit.pdfIn PDF document text
    • https://cerquilho.sp.gov.br/public/admin/globalarq/uploads/files/magobowopotajagepinek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=fiebre+persistente+en+adultos+pdfPDF 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_off0000d6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FC 10708 bytes
SHA-256: 37a39951603eb197ad4c95a8f5f41b44b9506a2cfbb6e99039ad8634c041e003
font_01_sfnt_off0000ef6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10780 20228 bytes
SHA-256: d4f46c883e85d9a432fb07a51f495164a443630e2659b72e97bebcf91c22b540

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