Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f54bddcb56b975…

MALICIOUS

PDF

88.4 KB Created: 2021-07-06 07:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 437ad36c83cbda3314bf1b0e5bf0f0fc SHA-1: d43aea70cb058554a01e9f325ee969671561b5e7 SHA-256: 93f54bddcb56b9759f50dc7f1958f434afac828056d935dade032a71f9c86f93
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links to distinct hosts, many of which appear to be compromised CMS uploads or disposable hosting, suggesting a link farm for SEO poisoning or to hide malicious destinations. No scripts were extracted, but the presence of external URIs and the overall heuristic profile strongly suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://bancodevida.com/bancodevida/admin/images/image/file/4914533138.pdf In PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • http://www.asslar.de/downloads/83242647880.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c148ab1a31b---zidokokimaz.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160cd85a68c195---pexawakisizijisebopi.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/pexiwiwerepevuv.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/jjb6mse8bd41cp087b0jbf5rkc/sinizujebig.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d725aa1d73---40216162445.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/noluxa.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84a6938517---10708938077.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/kisamamozolejut.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b902d1df4---47918099781.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/doruwobowexo.pdfIn PDF document text
    • https://autoparkalbanese.it/file/22036188078.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/4taeqedvcbi7s9ike1ft0n0he1/54948558729.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/44184f7a805accdf568239c2c0b884df/pixiti.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/42f0208c3e850eb750566b9c51981a18/vegonojivaniluxezewomo.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/dc29eekt9qdb0r5mg6qd2t9cr3/bewapujinujakabipu.pdfIn PDF document text
    • https://krono-original.vn/Images_upload/files/91019398554.pdfIn PDF document text
    • https://hpsoft.shop/upload/files/jevenadeziduxonugetu.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4646b24901---lixogijojavofefatiwojen.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210616133002128.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/ac18b36c6d6ba4c1f654e617b811c148/89624683817.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab78c9de1c6---sateximoribewem.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/vakadevakup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=roblox+mm2+frostsaber+valuePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E6 18552 bytes
SHA-256: a8639535d36dd2bf71104ca0587c23b56e2906b5f5b0441778f0996da8b0c893
font_01_sfnt_off000113d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012be9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE9 10752 bytes
SHA-256: 96bcb9bf88017aae886aa6833c86aa60cc7de43db1a5578e9a6daed061c26b6b
font_03_sfnt_off000144d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144D0 3956 bytes
SHA-256: b252d7afd58d8a8134b98375d36b2d134a5b35839d730340b8131d3cb14a678a

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