Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb5bb256a490195…

MALICIOUS

PDF

89.7 KB Created: 2021-06-27 10:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b7deb0785f49cebfb5f4f4bf796aeca5 SHA-1: c2b668e365b61dcd3d1adec9a70a773115cc3f7e SHA-256: abb5bb256a490195cc496ae6051158a9d8d4dd8d693ad37158025052d2151f62
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing or SEO manipulation campaign, likely intended to redirect users to malicious content or malware downloads.

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 http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/788df712e124f5ee547d06f0d390734a/61107826822.pdf In PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/bogeduvorigegetofevewoj.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc2d09bf03---28445005898.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836ddb01957---47677168895.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/64981ce5ea4ea1d810059e824e019d8c/94247240419.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/3cb258e00cee7a2d6a747d44c5f0cded/vudisebugaj.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d2b643598---23273732750.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a3a6752e3---50572681015.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/691d61abbac8595105d7f0af019d0b92/xesozimiberewogakanixa.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/5648689633.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/10554392467.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c95ca6daae9---xarixapulesedatozikosari.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/78520712933.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/4ac7fca2baae6f946d3554ab95dce128/vibopakivajinuguloru.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/gopupilujuxariwuvirif.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/83686214297.pdfIn PDF document text
    • http://wajl.net/img/file/202161513640.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/rojazokidofifidusovafut.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bf4e1cfa6---91081202949.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/t4up2oja3fmmod7aon8i5u92kr/25930566212.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/0282643fcf7b9691e030fc56e8eb9c4a/92471281606.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/32eb01a95f6b95ae8748f78ebc344885/93801057018.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/xesiduxavi.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c72aae28438---42237268603.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/fujewotejisukiwigal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=geometry+dash+free+download+latest+versionPDF 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_off0000f7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11000 10924 bytes
SHA-256: 257142ac81eb8628fbbcbcf93233d04743161911bf267d3f7b14ca53c3785136
font_02_sfnt_off00012939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12939 19084 bytes
SHA-256: 7dab40e2337db6301e66b512d6d892643c724230695f0c615fa6d5456b7ecc78

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