Malicious PDF — malware analysis report

Static analysis result for SHA-256 39bf17778c3fcad5…

MALICIOUS

PDF

128.5 KB Created: 2021-06-29 17:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f46b0aac82541fbebb0ca6cf774a0cfa SHA-1: ce9f285cda654e12d704d42bc7fe4fddadbaab55 SHA-256: 39bf17778c3fcad5c48890f22f845e2046dbf235e99fde4e20aeb8bf4bb619ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the PDF structure itself are indicative of a malicious document, likely intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://smidgel.ru/uplcv?utm_term=how+to+play+draven PDF link annotation
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b34e281506---4283679760.pdfIn PDF document text
    • http://insureacompany.com/userfiles/file/lusivuxilopalevipoxulig.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a800b99855---55384962498.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/kiwaxe.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e60a52e8ef---91285795217.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ba1b35198---97100421616.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098b0226ef4c---93958693529.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/16297085433.pdfIn PDF document text
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/jawulejojoko.pdfIn PDF document text
    • http://clingac.com/d/files/29029252614.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/t0mbjho0r35iv75mf2hatpr626/lorabikuwepejojop.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/73917760293.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/ea9514b648dc0994a4aee736eef580f5/74394307437.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/a80fbd197d71159a3174acdfc6bc110e/sirox.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/nukuzumixop.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/b595a0c22783f319a33f4755259a6039/kagezagoz.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/23336489598.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/3f206ebec4fa53258eb034648739d019/misifowedufelatijidimevu.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/d7b0bda1b8d13b6b1fdb56b10bcee6f9/nogosadijobizitemaje.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/8cfsfce32k44lq67m1rmr7kbe0/5149051973.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/gurupuvife.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/671449318.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/a344f418732c698e47d8328aad794153/lumuvowu.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16091243412967---76464015208.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_off000196af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196AF 10380 bytes
SHA-256: e4a32efc4abcf31728376f53bc2899723fb779db3f41729ab0debf8bf5feb776
font_01_sfnt_off0001ae54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE54 17704 bytes
SHA-256: b4b29dc309aafceef66c12c2ade3f2117d05716321c8ae5cb0f15d126c22770f
font_02_sfnt_off0001dcbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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