Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc1571ea28fac1a…

MALICIOUS

PDF

80.4 KB Created: 2021-09-20 06:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dd0e1379061aa6fb09bc299d2e718210 SHA-1: 9f845411b32b0196bd761f862209eeb9d26b37df SHA-256: 3cc1571ea28fac1abbbb930e59cab51f05dccae9650255e7439e7cc699466b7a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised CMS upload storage, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://dollarplus98.com/images/upload/files/fuledademilu.pdf In PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/xuxonar.pdfIn PDF document text
    • https://nikunjfoundation.org/ckfinder/userfiles/files/wixanux.pdfIn PDF document text
    • http://theurbanbazzaar.com/userfiles/file/4701772818.pdfIn PDF document text
    • http://land89.com/ckupload/files/pikabake.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/gokukibadado.pdfIn PDF document text
    • http://edallyshop.com/upload/files/36849961571.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/fd438e0eae54d68658071b4cb6f17418/tazadewa.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/penemurunusaxizibopuxul.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/3ljr4lg84q5jhfku1903bpldv0/96995161415.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/93992338792.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/zatagukolo.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/putolutafujobusuba.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16143bf0a2db36---jaluzujapijunida.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/pafunijur.pdfIn PDF document text
    • http://uhorder.com/upload/files/15280802390.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-16/20210916004606200408.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161370739dcb44---tikisoxinosofaj.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16146e1a481247---8682856321.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/5bda8cad7ae5d4f22ab68b7349f83dce/begelilasekunonufar.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/84960035101.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=solid+explorer+file+manager+premium+apkPDF 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_off0000d5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DE 10944 bytes
SHA-256: 6e7ae4f2e321f546a885d86ba047058ef57d2edb14933974fc8a10e9f95f6be8
font_01_sfnt_off0000eefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFD 17452 bytes
SHA-256: 0406f5b742a7a6ee8b73f7332d24b526a7db529fd016deb5db73c506fdd49dd2
font_02_sfnt_off00011c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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