Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e1e9a28a387623…

MALICIOUS

PDF

75.8 KB Created: 2021-09-04 12:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 62d0fd49f15f4c05619737a8cfe76c87 SHA-1: 099aa70290ce5dfb08195e9cd9aa939271c86063 SHA-256: b2e1e9a28a3876237228d95067648ed2754a25f5bda625ba715dd3b0a58fc40d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users to potentially malicious destinations. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/ce6746b161eb1760280d45243df4e7fa/fitulurisetatewiwad.pdf In PDF document text
    • https://arichaindia.com/userfiles/file/90846007176.pdfIn PDF document text
    • http://zatacorp.com/upload/files/90266873692.pdfIn PDF document text
    • http://artattack-concerts.de//files/file/guzakokuro.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/laxefamoriwaminovuza.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/59685598309.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c77ba074ec---jodazerolozebajebu.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ebc40c80c---13154922289.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/27583383417.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/tabekisumibobijekunutalu.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/vc5jhe4feon489f98kf0s9vqi2/99829194761.pdfIn PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/30929425238.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/48332329252.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/ed2ed970c85e875842da5dbf220714ed/kamofemosevabokinowuso.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/7212986b5f323bb1c436c788f1f2f1b0/31583444684.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/xujinesawimutine.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/vapoxu.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b7952b19d85---xizudejabuvifazewiwaje.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/nalumufetekujujajulagexu.pdfIn PDF document text
    • https://kartplast.com/resimler/files/33837846781.pdfIn PDF document text
    • http://chapelguild.com/images/usr/mojowadizoredurejez.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/3414668120.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/b85819cea45b8a1a60148fd1ba18087c/76747154463.pdfIn PDF document text
    • http://splogservice.ru/content/files/bimunik.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/pigjnpep3tf2gpspn90rmmi82r/61734510764.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=british+english+grammar+tenses+pdfPDF 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_off0000c3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D9 10876 bytes
SHA-256: 5915dbb013e5a05f62c819f1cd2581cd25124eb5de653f4ddf7f75d5801571ff
font_01_sfnt_off0000dc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8A 17296 bytes
SHA-256: b489234bfd424441a4c65a1fc5cc82fe020a4757740a519935db8bcc811cc01e
font_02_sfnt_off000108f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1