Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eebc81f78e3f6df…

MALICIOUS

PDF

82.1 KB Created: 2021-09-15 20:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 89179351cff34284d42c1428b8ceb1ca SHA-1: 656e7ffac6a393ec3012dce95e25d728481373ab SHA-256: 1eebc81f78e3f6df0a08a91f72621984b030e175755073c9056bb3eefe8f26b5
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains numerous links to external websites, some of which are hosted on compromised CMS upload storage or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URI links and compromised CMS upload links indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://smidgel.ru/uplcv?utm_term=turn+on+mi+phone+without+power+button PDF link annotation
    • http://iproperty.ae/userfiles/file/setududumegozotov.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16138670cc3893---navetagun.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/78432301092.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/18735421215.pdfIn PDF document text
    • https://sunsetlearningcenter.com/userfiles/file/jorujudekasu.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/mufomomufewowupewulenixid.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/rusilateminejaxije.pdfIn PDF document text
    • https://stalbeckers.nl/userfiles/image/file/nigolerusunevataxare.pdfIn PDF document text
    • https://ikansambel.com/contents/files/20429022196.pdfIn PDF document text
    • https://tumujerrusa.com/userfiles/mojerixoxaxugev.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/4456547968.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/luzefumu.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/90444198606.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c1982a9d9---saroka.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/161416620bab14---favetukuwemivu.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/zaravexofinenozakafiz.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/17503773346.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/94220788470.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/soxiwosuximigibizudulal.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/161320300611e5---7076691641.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/memamedidarogijozare.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/fejutaratonodadejag.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/88770769058.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/visofeledota.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/49472234248.pdfIn PDF document text
    • https://paeonia.ch/userfiles/files/ruwukojerozeg.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_off0000dced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCED 17932 bytes
SHA-256: 789b7ad36b83bfaa75df4acae7e97b4a8461b911e6a9a4d0c5755d5216edde08
font_01_sfnt_off00010b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7B 10428 bytes
SHA-256: 060711fbae4cffbb65b1a2cf17f2e633db6e492f5e5a394c0bde11a907cd324f
font_02_sfnt_off000122b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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