Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5906a1dd3d933c8…

MALICIOUS

PDF

95.1 KB Created: 2021-06-27 08:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 3b5e2f2ae92d7d71cb0e682ba3ced320 SHA-1: 9afae8cf0072e3ab485bdbabd75d6affcbc6888c SHA-256: d5906a1dd3d933c826796196bc164c8cdf17e0df5664e44d2e6c15829dbaa0b8
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that lead to various websites, including compromised CMS uploads and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The heuristic firings confirm the presence of external URIs and link farms, suggesting a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://huntic.ru/uplcv?utm_term=the+family+nudism PDF link annotation
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/938b375da7362beda8917fccfe719ae6/fiwup.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087d1c72d891---51081799301.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c2a29cd6c---xupeg.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/51369071603.pdfIn PDF document text
    • http://1careglobal.com/upload/files/38991709128.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/minolinufuleginedonagom.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/pilodorulodexipodakaxideg.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/60611389815.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/663e5e6f343357293887ec1f741673aa/54709135831.pdfIn PDF document text
    • http://richwoods1969.com/clients/861079/File/tokasexapizimixu.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/rusepunupem.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/2e1f0fd639ae0653b7b7d9d8e87b0b7a/binisarisudiniwiwevo.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b680964856c488e18e18a87a861cf874/66411816541.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e5dbc036e---lanezisimezudijowuzo.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ef1c2688f---61852319179.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/sodedarolifesesiwogagisi.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/02e48f2722711995d9e2d283f30680ab/80295010871.pdfIn PDF document text
    • http://apvn.info/userfiles/file/jisurebawitonuliru.pdfIn PDF document text
    • http://gangwonbnb.com/FileData/ckfinder/files/20210620_92F916EBB88DA96E.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e87f4975ea---xokuxasakudawiw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08fac61fd6---56029259067.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/vawetezudenep.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7bb325bbd---96143983852.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/65067641114.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_off000112bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BF 17264 bytes
SHA-256: f9a0f7da4f2e4c5f1fd2a06a97bebf6c2f569e3fa59b9b4f8dc78d780bb7662f
font_01_sfnt_off00013fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FDA 10476 bytes
SHA-256: e094b586e670e4dee1c06c8181b035bac92cd9d5d8e25ace8b880881e3fee98a
font_02_sfnt_off0001576a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1576A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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