Malicious PDF — malware analysis report

Static analysis result for SHA-256 0afbc6a9de404516…

MALICIOUS

PDF

101.4 KB Created: 2021-07-13 06:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: bb5d02ba8ac1a6e56dcf1f878e34fd2f SHA-1: a3dee36102a53608f5d0cbb2cdf297d0b54831d6 SHA-256: 0afbc6a9de404516a714895826960227a07a9bb5f19b4f0225fdb4a40b6a7c78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to external websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://beerskiboot.com/img/upload/file/21379325776.pdf In PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/3fe114209ae3a1581d46b799e4be2eaf/kotudopugufemelemapukuka.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/26605893122.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.org/upload/files/60246752043.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f57558c6d4---fasepiroresewemeji.pdfIn PDF document text
    • http://diclenakliyat.com/userfiles/file/82090200191.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/fufugabulibi.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/saxuj.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160702c6e27156---subonepukobekuf.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160781b3da90ed---verilurameke.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/noxanunav.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-6/20210506223157396720.pdfIn PDF document text
    • https://area5srl.it/file/92136340156.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/908c649916ed473241e927dd5d7abc0e/wutaravoxite.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160770a02b75ed---lapijolukoja.pdfIn PDF document text
    • https://kiameds.com/images/upload/files/18636282981.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/c4546e4f14ba3bfd2e60c112519513fc/13516174365.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/33409278757.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/0elgtod6mfpe38fc58dlp23a46/3728493151.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078daeeabb89---6531677648.pdfIn PDF document text
    • https://sealskinz.ru/files/file/39446649524.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/63070320603.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/kuwabomepijevafarekuf.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/875be15c96de4e22fda2e8f1beebe82d/toregemez.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/g99dkguspv2ivndifisotdflf4/bonajufap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=cervix+soft+and+low+before+periodPDF 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_off000126bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECD 18048 bytes
SHA-256: cda936020fe4de34a58d42a82781d7eb057a6d2e68859dfb5fd69eaecbf8e6fb
font_02_sfnt_off00016d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D71 10916 bytes
SHA-256: 3962181418cb2b3ca7108efa07127e2a812a91d306578639d56ec7bba321e39d

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