Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c62f58a1c8089e…

MALICIOUS

PDF

94.0 KB Created: 2021-09-21 04:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fcafc07477212b0346f5a5b5879ddb7e SHA-1: 7c501cea6f157ee0a214905d5093c01bf5919927 SHA-256: 32c62f58a1c8089e7438b12c49c3a6bdbbb5c5e4627ec8da2cc9bef8c8dd7876
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous URLs that point to compromised WordPress sites and other disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content or phishing pages. No scripts were extracted from this sample, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://philabc.ru/uplcv?utm_term=china+rich+girlfriend+free+pdf PDF link annotation
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e713561cb---69951987322.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/xuwixaxova.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138767bb7d43---41182555088.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/65204173263.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/93618388367.pdfIn PDF document text
    • http://proximeo.com/ckfinder/userfiles/files/95793766829.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4f44c50c8---33289435164.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/43956364057.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/4deccd97cf4dc118ea6efb458905dd5b/84389616328.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/65559668366.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/xupipozujusozazerivabave.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/40566734460.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/161490c3809de2---80793032529.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/rupumodowopa.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/fizeradefef.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/xedegute.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/biwezufobujobobov.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/karivimex.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/73514993950.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/kofebodenewibu.pdfIn PDF document text
    • https://ibericadearmerias.com/file/8122094544.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/99631581263.pdfIn 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_off00010798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10798 19704 bytes
SHA-256: 2830868b414abce4b9cad11b5b92d07043b3a43ed790818011b5025e32766f5d
font_01_sfnt_off00013ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC6 10544 bytes
SHA-256: cb7f3c7c453aff69ce986a29ee5c57146d9fe2287d6b2d12b1687c1ae5723791
font_02_sfnt_off0001527d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1527D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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