Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0046f60d229ded…

MALICIOUS

PDF

82.5 KB Created: 2021-10-06 12:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 04d6a1d919c903ab0308ecc8528fee2f SHA-1: ba6c86476c5ea4b3bd896b42c676a6bbed0c32b2 SHA-256: ea0046f60d229ded647e1cb7378f9ed5a23dbc21662f07b4d087520abe676470
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and a link farm pointing to compromised CMS uploads and disposable hosting. The embedded JavaScript likely facilitates the redirection to external URLs, which are part of a link farm designed to obscure the final destination, potentially leading to phishing or malware downloads. The presence of multiple links to potentially compromised or disposable domains suggests an attempt to evade detection and distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://houselandia.ru/files/28973791164.pdf In PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/35595214496.pdfIn PDF document text
    • http://tatagz.com/uploadfile/files/75980987838.pdfIn PDF document text
    • http://marsalanoleggio.it/userfiles/files/5055512064.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/kutezadatuvidatewimokipa.pdfIn PDF document text
    • http://medeeatour.ro/mm/file/nozeguradifilisirizu.pdfIn PDF document text
    • http://hangquangauto.com/files/72971366429.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/talusepuzifok.pdfIn PDF document text
    • https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/83364940817.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///73381054990.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/32571060203.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/farorokolamudaxo.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/4638093983.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/xaperulujasis.pdfIn PDF document text
    • http://school15-tyumen.ru/f/70927137748.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134271369004---mokobowaletiramizutepa.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/60615068321.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/wexik.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/98915456657.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/98529540168.pdfIn PDF document text
    • http://defhjdr.friend-match.com/upload/files/doridumo.pdfIn PDF document text
    • http://balatonfurediallatorvos.hu/userfiles/file/33882708419.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/fa5cbe02e8ce8778c2e1065d4859bafc/13298178535.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614298b9879db---zijozulofotogukupabin.pdfIn PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/vatatajexivib.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/11457919639.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/uk48oj9o13k6e7mjgagd9dkc2h/84222992253.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=young+thug+ft+ti+about+the+money+mp3+downloadPDF 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_off0000d6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 11272 bytes
SHA-256: e832f752fd43f7c078db8fbfc7580dbd30c661f14372f62fa98de252fd66abe5
font_02_sfnt_off000108c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C0 20124 bytes
SHA-256: 5ea68876f696d1386191ce35ea4cd37a7a33b1c8399a39a1b2b3f3a947ce3c8c

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