Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74b2ae4dc42c677…

MALICIOUS

PDF

79.0 KB Created: 2021-07-09 12:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6a4a829ce1352f05e5617eff3661e682 SHA-1: 7f14e67d58a11334ca70fba69389ee61547d0271 SHA-256: d74b2ae4dc42c677cc4075761b164b4f9190504cb27cf7252b5a4cb006ef6347
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, specifically within form upload directories. These links likely serve as a link farm to distribute further malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c791c77940---21726570145.pdf In PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03a6932308---44125801342.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092335376e09---nedifaji.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/sexulekapazuluzupije.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f2e753f97---pemej.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/a860b68b33ae835ae16f4a5d3673f35c/76517979708.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607945af64be3---verinisotago.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/ec141bd8e2e83244307472aeefb62e9f/vaveluxokuxolavobozupemis.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/fems85ma1m3cq5bovl02l66iuq/52884168310.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbf3a6cfdb---73458156311.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/ruroxegupubapigigivuru.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/92689568810.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/i6j5h7s9jh3k7nu9c14kavtnkc/dufujaxuborixulisamuzexed.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b744c602542---lupijajafimamutap.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba92533152c---vudumavidenaxuj.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/bk7i6s5smi8hl07n3b9uuupi36/zixefinusomixa.pdfIn PDF document text
    • http://saokienviet.com/uploads/image/files/bikalifugitowuketanav.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/66575271339.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/7f714350af5c68d467cc0b72e942b75a/wiximoxedibav.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/ridasu.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/26250422593.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160844e1db4188---mugiwo.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/941jh1q0nuv3qs2t7jkec0jcnr/6623078153.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210601220120.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=styrofoam+compactor+costPDF link annotation
    • 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_off0000d15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15B 10456 bytes
SHA-256: 4d78b4df0da032e1f07a8fdb5f3fffc3a04e441f58e56252b052c4b3b2329a77
font_01_sfnt_off0000e932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10144 17592 bytes
SHA-256: 78c645a180672acf066a8fd4413552823e59464fb8448a1c2588b30e6501e04b