Malicious PDF — malware analysis report

Static analysis result for SHA-256 9add600965e88b5f…

MALICIOUS

PDF

86.4 KB Created: 2021-09-04 16:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 73ba564258d51b787e1afc28a4b3b0fd SHA-1: 189160ef225d8e99bf6b878421a50aaa42bef0e4 SHA-256: 9add600965e88b5f7c68200d95d0a605c962afc8411267e28c84f152ef36448c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user interactions, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/uplcv?utm_term=spoken+english+guru+english+speaking+book+pdf PDF link annotation
    • http://www.alexgis.com/siteuploads/editorimg/file/poleliwugilorozaw.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/gudejimefefalisoru.pdfIn PDF document text
    • https://krossi.ru/images/content/files/84966734851.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/nudakobiwerosorezamagu.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/7df5e5601ee79fb3625368d7f4c3d47e/80512428355.pdfIn PDF document text
    • http://leton.pl/userfiles/file/bujesaxapimarexutid.pdfIn PDF document text
    • https://kaptenhoki.com/contents//files/13406803647.pdfIn PDF document text
    • https://aromamarketing.md/img/files/towumowibuzosuve.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/pusofodizo.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078d8a23eb5c---ratovagunijojir.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/70e20e90b62f2f0274fe4dffe3163368/dajolik.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bc4c33c9e---gumedufuwusojepivisixo.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/37394063318.pdfIn PDF document text
    • https://coluer.ir/documents/file/85458461872.pdfIn PDF document text
    • http://weilandvloeren.nl/fckimages/86904646552.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/kats06vcuql9nuto5amhqh79tb/80688688776.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611758e00c613---80898001498.pdfIn PDF document text
    • http://delve-cr.com/uploads/52085477545.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c5406bb77d0---junuwexupupikovirefap.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f07a790cd8---16928138138.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/kosotiripusivejalobem.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/kanarumafinikavazofavozo.pdfIn PDF document text
    • http://asvpp.fr/pdf/32552019789.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/0401vhas8q0ek62rlrd1c4hp05/84369075033.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_off0000e9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E5 18388 bytes
SHA-256: 4561d5b3183c88e168517037c0cc6680ba1d3bf6258d2f03e663525f8566a72f
font_01_sfnt_off000119ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13201 11084 bytes
SHA-256: 09f620de1af93e6744454340baefd3ff6fe9020b7f1fa96b28e4238423d81ee2

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