Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff1fbc79e45a9be1…

MALICIOUS

PDF

71.7 KB Created: 2021-06-26 01:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 54727f90f04c550e695a614065bdacb2 SHA-1: 99123700c96d56172563c22bc222976087bc0bab SHA-256: ff1fbc79e45a9be1b0b3e0066ecb7eae805cecf6d0e65de5225ff3253827e520
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The presence of external URIs and link farm characteristics suggests an attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://robertfeinberglaw.com/images/edit_images/file/71449527768.pdf In PDF document text
    • http://akcjonariusz.com/UserFiles/file/vateradezavisabapa.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/jumoretetulusi.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/eigcchrnte1ff584uu940562md/buwazukonipivupidele.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/642ec78071e05a3299962d0aa2a9654a/96945925134.pdfIn PDF document text
    • http://splogservice.ru/content/file/damoxedili.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/8ce44a6075d8fb1f9dbb4cd08f83b466/28220829018.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/ludoludiduwa.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609adf3579805---38788989588.pdfIn PDF document text
    • https://laplacedesstores.com/upload/file/77195156059.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/nasexu.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/ee792d13530ece409554687fdabf3dba/82682462213.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/41511762997.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/25157681153.pdfIn PDF document text
    • https://biothiennam.com/media/ftp/file/45537024928.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/mazumesofefovijajowi.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/77797728170.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/un1ffpgj901qr2bi1ivcov1kju/febipimazewaj.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/55049068076.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7823d9f97---zerojewamodebusujaxo.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/2fdepf1qaqcndouh5pap6cd3j6/95922669876.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=imr+8208+xbr+for+salePDF 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_off0000b6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6E6 16392 bytes
SHA-256: 735710151d15e02c8431039bee7fe19837bbc818f36b05965faa9f8847359616
font_01_sfnt_off0000e166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE166 10724 bytes
SHA-256: 512de60ab2f5d2e8b8f52c6c1d5a763b9fea4ba0eb028c7a7f23353cddddcb61
font_02_sfnt_off0000fa22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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