Malicious PDF — malware analysis report

Static analysis result for SHA-256 868dd2148fe4303c…

MALICIOUS

PDF

85.9 KB Created: 2021-07-13 21:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5da15db0ad03359c76de85edd1c2a9c1 SHA-1: 004187782661446653c4f9ce0643e452587f7e6c SHA-256: 868dd2148fe4303c2a7a2662614f1060e9ed2ea13b306ce94575f1b6f34a7923
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or SEO manipulation scheme. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery, likely via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/ca3964e202c725aa32461395e04d578e/baweviviniwazuv.pdf In PDF document text
    • http://www.kymkarajok.net/tiedostot/files/61478082628.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/66013331004.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/95541573188.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160bad5974929b---vadatadadu.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/be23094558a87e4a5f38b84c7f559622/laxalakafaweweluxunubemub.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/lejasuwiwazilukovuri.pdfIn PDF document text
    • https://ludbaegitim.com/calisma2/files/uploads/92446242969.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cb18f3ce5---sisibikida.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf4af8a9b5---nimabononexux.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/54140566698.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/sofabofo.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/bb462c4e4e821de6f4e13fa794a9b5c9/95260827496.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92907e1cf2---6618766770.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021062511052733097.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/t2joqaqsu7e8bsu8ao79d4oc77/garonewepagoxo.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/leduz.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf17cb415f4---desinuwuzufudave.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160afead01f8b6---xopumipuvexifexepofavavox.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607226b39251b---73370583591.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc98d7e6f7---buwakemarilijuf.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/turatinagagologoniso.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/28091283605.pdfIn PDF document text
    • http://misspacificus.com/clients/873634/File/27446069.pdfIn PDF document text
    • http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/90619615069.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=the+book+written+by+karl+marxPDF link annotation
    • https://www.alamy.com/licenses-and-pricing/?v=1In PDF document text
    • https://www.alamy.com/cover-of-le-capital-bIn 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://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_off0000ecfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001050d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050D 17120 bytes
SHA-256: c5fa219b394bade349300980c0d0afaf8e36f76c3ad4c31b95090aa9edb9db8c
font_02_sfnt_off00013192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13192 10704 bytes
SHA-256: ebfd8d8f106163dd46feb8607ad5b4bbd29afcbc98c9c842f5f21276a17fa591