Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a332896762d9ab…

MALICIOUS

PDF

96.1 KB Created: 2021-07-04 00:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09be7d1719472441e1503f792aaaa247 SHA-1: 62647367c139ad5ce198650b52cad39311a5ce89 SHA-256: 76a332896762d9ab53aa54671d1c5feff1d8fd93087beb7667ac7038455c5f44
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to manipulate search results or host malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential SEO manipulation or tracking effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/b0qlbmg6f2dr2bi3t3h6kjbs97/41086167219.pdf
    • http://tortsurprise.ru/upload/redactor/files/48243954016.pdf
    • http://ahkkpcm.org/userfiles/13650156099.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/7dk5dctapofovrs76fm0fv814m/31291011022.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d99e9381e---81927872283.pdf
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/7130d3b4b767b1104c26def9c5c8cd04/xetukemumetajexadara.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160772707c8b7c---widajidijuguxivusose.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807edcb156c---63315613038.pdf
    • https://matrainagycsalados.hu/userfiles/file/32861031676.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5724378f8---jimopo.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160864a291e10a---36423773512.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/9rm1pc4reiu4shcndq5tf9uske/9705804382.pdf
    • http://akcjonariusz.com/UserFiles/file/32154853329.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4477cbecd71960eff19bea2712fce475/95179229754.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dca499189d---reromufovifu.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/5ebh4onrj59o3kb04t6n9cjqm0/50697232023.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90bc21f7bf---63992132226.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/b5422781a699ba21e4b5cbb46df4650d/fenagaka.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160acb9fc9615c---38182034924.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ca51209fbe4---bosisiwabefowogekonaboler.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160882f89b42aa---ralanimikekederinawetosu.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f51db6609b---dewibepagivi.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d9cbcd8b6c1---32512423622.pdf
    • http://ktcz.eu/files/files/97232174968.pdf
    • https://supermagnum-bg.com/userfiles/file/fatubibutagarup.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=adobe+after+effects+crack+mac
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105fc.bin
137297cc4448b507d27c591ef0373b1ff5f70809b478e49d66623693f1f6e1fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105FC 23276 bytes
font_01_sfnt_off0001404a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1404A 16792 bytes
font_02_sfnt_off00015861.bin
06a7a06ce36f13208a2e6c19462c800cdab621dec09a936fab1d57bf2b7b5442		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15861 10608 bytes

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