Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c51edd3242c380…

MALICIOUS

PDF

91.8 KB Created: 2021-07-06 21:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 53bc803a03bb2eef238ca155a0e71e97 SHA-1: ca6f392d6d23ab784b767cbd0aa3c1ec13ca4989 SHA-256: e7c51edd3242c380404daa848300ec66088d472aec0379e496fb4e6984511b2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URLs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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=best+opening+of+anime PDF link annotation
    • http://yuanyoujie.vip/userfiles/file/sidujedawosasimobaj.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///19671745859.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ab3ff582cd0---radujiduwitu.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/24356259845.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/fl8gag9ona18jp8tsmb2olqg1n/dagewuvat.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9baa227de---20010095025.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/21299744835.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6t01jvb1846s952bjhgvvukbd4/megadeka.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/fagebizogafapufajupi.pdfIn PDF document text
    • http://slp61.com/clients/e/e2/e296dcecfd7d10ffef0cc83fef253c72/File/96306205748.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/89778939287.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/e65596e8aa6a028e67fdcd1118f478c9/9879201213.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/0a2cfde633dab515c404fcdb53cf8e75/90922363731.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d626916c1---fogetexozulaxadutewib.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/31824263804.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160709c4f62823---96439750565.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/63658331684.pdfIn PDF document text
    • https://altbuket.ru/files/6649956609.pdfIn PDF document text
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/74428145588.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210616192238.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/64990983157.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/motelalasuso.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/71878208156.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_off00010698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10698 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAA 16704 bytes
SHA-256: 8b31f44dd063271a4bf1849f2a1ed1b6c22137c45b667532be93640b1ca919a0
font_02_sfnt_off000149f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149F4 10608 bytes
SHA-256: 93e78c318e2f389f95cc1a348d98ad6e5e9d48d75bec01a4eb9b0b087a168760

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