Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af798304d8ebab2…

MALICIOUS

PDF

125.1 KB Created: 2022-03-05 22:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: d723ba0431852663b2d22188c7c22f5e SHA-1: 3893bf2c4ecdfa4727f3864125b411efc1ff09b1 SHA-256: 4af798304d8ebab29eb5ce4d1ed31afa987b8f039bde977ffbfe9f6e96273a85
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to obscure the final malicious destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9750

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 https://lazav.co.za/XSRYdR1H?utm_term=aaj+premanande+bahu+tule+dj+song PDF link annotation
    • https://pointvirgule.ca/upload/editor/file/mipoxukeleluw.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20220210215054.pdfIn PDF document text
    • http://websurin.net/UserFiles/File/72107341435.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/92132892489.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/162238ad737452---nagezujubed.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/leporarelepumagezu.pdfIn PDF document text
    • http://szm.hu/userfiles/file/wagiw.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/memozifuketigifubu.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/bugewilikofakofa.pdfIn PDF document text
    • http://aleksey-mihalchik.ru/upload/files/xapuzajuwakijuxotakozebo.pdfIn PDF document text
    • http://kingkady.cn/uploadfile/files/ruramepire.pdfIn PDF document text
    • https://sezam-doors.com/userfiles/files/46346887259.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/vusumolamuxotevasiwi.pdfIn PDF document text
    • http://tech-sub.com/userfiles/file/dogosigobivivenik.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20220215_C3080E267AD83A64.pdfIn PDF document text
    • http://chianchang.yun2u.com/upload/files/bexumabawafil.pdfIn PDF document text
    • http://stmarysharipad.com/userfiles/file/35151122537.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/pibodofiv.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/fuwuradunirufe.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621772bbc5e9d---xixalugijibakurineb.pdfIn PDF document text
    • https://kristinanamaste.eu/files/5464258169.pdfIn PDF document text
    • https://songod.vn/uploads/image/files/70842983890.pdfIn PDF document text
    • https://ever-progress.com/upload/files/folako.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/89023830528.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621acbc38df25---1586803674.pdfIn PDF document text
    • http://trailerdepot.ca/site-uploads/lopuvujefabamuzigufadolu.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621987cc51a42---91267816631.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/95424164922.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20220210_100144.pdfIn PDF document text
    • http://forensique.ch/app/webroot/kcfinder/upload/files/ruxoxifudarejoponot.pdfIn PDF document text
    • http://e-sportis.com/images/upload/84546577324.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/46862126811.pdfIn PDF document text
    • http://aprt1day.ru/file/5208646917.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/33209255502.pdfIn PDF document text
    • http://www.albertoabajolimousin.com/abm/Bibliotecas/kcfinder/upload/files/gisujikodivesebewapixus.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/sepolukiwufope.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1620045447a652---taduzalidul.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/gafaxejobupafiximen.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_off00017be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BE0 11096 bytes
SHA-256: 58fe800b3c66047f6671947d3f516f97ce6a29f8d0f37bb487ce6382e1301dc3
font_01_sfnt_off00019526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19526 21628 bytes
SHA-256: 276ac6d15e7bc2a896c6a97604b5ef198d7f0b70bc784ce6baf00fdc4d133788
font_02_sfnt_off0001ce31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE31 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9

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