Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab43c41f6ef44db…

MALICIOUS

PDF

98.4 KB Created: 2021-06-27 06:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a38467b672e7a75a99921197dcfc4b34 SHA-1: 442a78dad4faaa32a1689a0441d4883e9680049c SHA-256: 8ab43c41f6ef44db1e6622f5d3caaafbe62bb2945430ba6bac1e156778a87c8b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan delivery mechanism. The document contains numerous links to external sites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the 'Fake invoice / payment lure' heuristic further support the conclusion that this file is designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://queure.ru/uplcv?utm_term=example+of+discrimination+in+classical+conditioning PDF link annotation
    • http://teplospectr.ru/images/files/26114757381.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/dc73103c2745aa1961b45650db22acef/mofivofadi.pdfIn PDF document text
    • http://siembra.me/uploads/files/vupofixori.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16081c533d45e4---70019956445.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/b66a2e8ac783d947c7f690ce8d1e402e/24447623811.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/54699585111.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/l5np0j541rmluoefagidvm8d1l/28353608287.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/javixaxewazuxidixarufi.pdfIn PDF document text
    • https://0900107678.com/upload/file/jigidaxibajopajadap.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160806cff6191c---zimunurigukegeki.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/ruwudofulir.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608582d1262b4---jesejeledekajoruxuvufusez.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/6rs7t8bgjrqgrkg6dcof7ud0n0/gezugisiwisopilojukux.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/c61007c00ac0dec224d90a089e2f944d/34409048313.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/29711763838bc147005f205ea4ef170e/66971991340.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ed19c12b2---27463269346.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/edea04bb0e4d65e486e95aa339ba53ac/wakerewunuzabim.pdfIn PDF document text
    • https://hirurgija.me//files/nufawo.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/sevude.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/jorajexerizuvaxazakenuwe.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16074034742e35---bibefefojevisopafaxofox.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd8bfbc7d0---jifujinesoxofolatokugonav.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075939bc70e0---76144758626.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/lhbjtcm5csjiflaha4uppi2lui/46742298746.pdfIn PDF document text
    • http://educationexplosion.com/clients/a/aa/aae59ec6301d25964842a0067e0ae100/File/dujadoxirakor.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd1a3c2620---90625765612.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_off00011c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13487 11048 bytes
SHA-256: a1d208d66f0d53089ccee289b3adbd04780ada20386b96dc262bea32ec0a2722
font_02_sfnt_off00014e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E02 17496 bytes
SHA-256: f564fa5d6b6855e23bf7a37d8acbbb3e1d263b7cbfe030f20f826eeae8c3928b

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