Malicious PDF — malware analysis report

Static analysis result for SHA-256 4711d5a658098217…

MALICIOUS

PDF

85.9 KB Created: 2021-06-26 04:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 717accc4efd977544ca461d4813ede54 SHA-1: 9ba713d50d07f0ec6c02f28ec0047d7f0a4a61e8 SHA-256: 4711d5a658098217056ce6bf719376920da8f5f4a0db8c79165b574e3bf26a2f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, likely intended to redirect users to phishing sites or download further malware. The PDF structure and the presence of multiple links on compromised WordPress uploads suggest a tactic to obscure the final destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://crewmak.ru/uplcv?utm_term=birth+certificate+stock+number PDF link annotation
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608deb39725ea---muzujafu.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d04f02ceba---29385460773.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/diwovatofubiretale.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/52296438008.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/1kkqvdvgup082b5sopu8ib1fe4/32654649267.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/zigezidexezujuwesiz.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16090963735075---60247061723.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae20f04bb6d---dubatetilaxafuluvojeteg.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0bbf354d4---566179638.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/82868374489.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/nabelewutumiruweb.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/ff6ffcbc706cc6f05fa98f326e309558/26612136929.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/bigoposojemotefabalumik.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709b3f5de96---69128300895.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d89a5d3165---suliwebanunoxazosimad.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160729e758974c---wunasekepilisova.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/tidebobaxexabase.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160abf9f7c1e58---23239843019.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/htnne31ccuraf6u9rtj8tdukd5/jodawanoxu.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/4292784cafb61ff3447521bc80f1f727/80863258180.pdfIn PDF document text
    • http://pattersonandoliphantfamily.com/clients/875492/File/94055782175.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cb19e80b2---suzozatenizabafuvi.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077cc9965a1c---86983140375.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/7eefd77aefb5186f356da5c817177b2c/nukavogexaravilejakeduxav.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607723bf7e357---nakeminimu.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a0e08f00b---nijifirelonuwafovekegu.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_off0000ee11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE11 16476 bytes
SHA-256: ce090b4e24e90a7015e19c9e4f40a06cc509a5d80145f43d71c6cf8cfef3c160
font_01_sfnt_off000118d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D7 10940 bytes
SHA-256: d51b221b133c386f95be224b47f2ea6f8bd331d43e3ba519b48a34cf48b4dd48
font_02_sfnt_off00013215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13215 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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