Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddfc811a2563049b…

MALICIOUS

PDF

78.2 KB Created: 2021-07-27 02:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 03b344a5440aaa15300cc359e2af0079 SHA-1: 1b6fc0298baa26b2bee130624ad18cd127cdc38e SHA-256: ddfc811a2563049b12f7cfebfd02da8e2330355bbbf34103eaed7e90bf499933
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to compromised WordPress sites or raw IP addresses, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or serving a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://telmeed.com/web/ckfinder/userfiles/files/9541319569.pdf In PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e75714f629---77061922329.pdfIn PDF document text
    • http://allseasonsbanquet.com/clients/868236/File/numobenekugoxujifi.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093a41c28a7d---36130251056.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/93112927461.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/divururesaxobisogima.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8eaf91de34---zexofoxaziwi.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/xamuk.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/71560362186.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160986ce322c4f---31721583942.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160d44e704f197---sasoweporabovozewavavemiz.pdfPDF link annotation
    • http://4grd.com/cmsimages/file/39661575705.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/63284286117.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/kosunuwe.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/95csnqepbfsbuld4m7v81008s6/bunevijuginowakikagad.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a81ced4bd5d---wedodavisidowisakugumeja.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/45217597762.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/38f72934db2bc64ddf1a4fc3039fd0ab/18195085116.pdfIn PDF document text
    • http://davis-wilford.com/clients/5/5d/5d1655677b271656441dfc21bb295863/File/42041464376.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/f58d9e03928308ff1c4a7f2955910dba/rirosiginagogimefegeju.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/sokuzorisakomumiweki.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608224c4c6f6c---bebawi.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/tuvokaworox.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c300c48c76f---ditumuvarasuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=sangili+karuppan+song+mp3+free+download+masstamilanPDF 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_off0000cb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB59 11364 bytes
SHA-256: 1fa92020f822aea9887ae118aee610d86733b984dbb16def51b05e9e2f5fb2dc
font_01_sfnt_off0000e5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0D 17196 bytes
SHA-256: 24f5006d9cf78653b276a16120b9b66cf8dc35aff80fb5cd3500a4aab406da22

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