Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd6f8d304bc1e4d…

MALICIOUS

PDF

104.3 KB Created: 2021-09-07 20:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: dd5a2052d68aedeaeda31136d09f3eb2 SHA-1: 89e9dfca548c2e5410bc431afa7dc95d779d2c41 SHA-256: 0dd6f8d304bc1e4d3d05f73ed70cff57e1a67278a931c9f8de2106df441da568
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to host or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f15e466aae---xoxetufenilej.pdf In PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a651857d24c---wakeriweladufuzas.pdfIn PDF document text
    • http://auchli-appenzeller.ch/userfiles/files/xekovuz.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/depupigekuvijevanala.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdc37443eb---fufiletexe.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984bbe249e3---21463035416.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/hbrugcebm2behfjoc9a0v1gbp8/61500674012.pdfIn PDF document text
    • http://gdfsztal.com/uploadfile/files/vuleveso.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/migugoburekab.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/fd3cacdbfdf16983eb0f62b830567d72/95909422473.pdfIn PDF document text
    • https://aashianarealty.com/file/36694404234.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/wepirezusefalopiwalepi.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/gepomusunuxewixa.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e8364f1cc71---jokonutugabowofisasan.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65dd60432e---xaludawuzoke.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/334c88ce1d5fbbdeb8a1ce0547f8fcb5/ladoxavoluranetamige.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/doxenatavenaxilem.pdfIn PDF document text
    • http://ridgefieldpark1967.com/clients/3/39/39eebdc8797e30ee23d4fd57d071fd44/File/49190612771.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/468929bbfcda2db45005ba8b9cba42ed/95255761893.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/3822888746.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/sekakukipun.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090283f8bde7---sawowexaroxufafokibodelo.pdfIn PDF document text
    • http://autolubitel-irk.ru/userfiles/file/rekawegufatefikabafoxeta.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/57588728588.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/vanarewowijebopuvibar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=campos+y+ondas+electromagneticas+pdfPDF 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_off00012eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EEF 11108 bytes
SHA-256: 1703aed78a4185aef85bffd232658b2815b51847f2ca98eb6b14554e0b9da727
font_01_sfnt_off000148a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148A0 19904 bytes
SHA-256: 8d9778e8e304a6f6e45bd10d06640322a2f3abb86bb322073156fc3810134369
font_02_sfnt_off00017b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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