Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09cab554dd873d6…

MALICIOUS

PDF

85.3 KB Created: 2021-08-21 22:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 47c7c42c0545142169e98255253d8b26 SHA-1: e5609282a51857c8f655d6462e59d6c0c62bbd3a SHA-256: d09cab554dd873d64c5f3ecf1e7d982bf344c27129f3e366c2c4c594c56d62c7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to distribute phishing content or malware. The document body is unreadable, but the presence of external URIs and link farm indicators strongly suggests a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://wastran.ru/uplcv?utm_term=settings+for+scotts+speedy+green+3000+spreader PDF link annotation
    • https://www.xyoaa.org/sites/default/files/files/juwebelejividamuxamiluna.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/tedutonokupom.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/0jd81p21lj0jv0116upclgfrv5/78124497794.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb939a4c5b---79185941419.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16096774004368---jejokofegadelutuvekos.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/suzizixo.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9cf899062d---xobegujisuwuze.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/26110303628.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079419163522---66896654785.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/1c0c2074d52cf8ee8170ffcab3b3b059/wowubo.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/nejarosawazemawowina.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/a5e8d7e8472515ce06198897046f48ff/juvelanaro.pdfIn PDF document text
    • https://botorka.ro/userfiles/file/jolomogimarudula.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/kuhfff08saaspcuncusmv4n9hr/wabojapepena.pdfIn PDF document text
    • https://stvorki.ru/files/file/7900496744.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/6862932481.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/jemapejeg.pdfIn PDF document text
    • http://www.bandungmesin.com/file/duzewamukirasanipotovuf.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e68e89a9a---90250496491.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f56b2e903d---rinaseren.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1780f708ae---wefajebemeviduf.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/74459178063.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/hq0i5nh6c460eqa5trh5ifeo63/95740677149.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/38920431518.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_off0000e5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 11232 bytes
SHA-256: a9f8add5d9ce39a99552aaa0fc4de07ea4e49cac590e46a5fcf0b74183b2ad52
font_02_sfnt_off00011814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11814 17116 bytes
SHA-256: 177df519c3130d8bc5b6b95015e306f5997f2d6493335c380c76d37ecb20e882

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