Malicious PDF — malware analysis report

Static analysis result for SHA-256 50739be9467ac23b…

MALICIOUS

PDF

82.3 KB Created: 2021-06-30 12:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e719ad830648b4b8d8dd08fdf8df7273 SHA-1: f43f397eaae4e140f3c372dca46d829a68740652 SHA-256: 50739be9467ac23b88423550bfa6c5d8f106650f73498ab7d6caa01007d5bc34
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by numerous heuristics flagging it as a link farm pointing to compromised or disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://inwebjor.ru/uplcv?utm_term=r+and+d+sports+cards PDF link annotation
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/74het22e23p71jl6otphoscnak/tawawisojaditepejurimeba.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/semazipugotemedaxakak.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/zuwitakoniliwozafebir.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/i8t10mht340jcc380d2vg5glpk/kutegevuzarenu.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/1b23c4cb98dd8fe5f2f39f52905cc49f/41237445922.pdfIn PDF document text
    • https://mszukam.pl/dat//file/77876143104.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/fba3905049d8963e2054e4bfca57de67/xoxidosiwomujafaxugar.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6d0f08428---51700992744.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/86672463288.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/fk859kp95bug1ci87s5nap70af/delixuvaxiganosot.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/30jj2ueaa1pb1mubp6njiu4f7c/70145585160.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/ae1e451694c778b23f3536b874b5a17b/vekiriripabefepem.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607550c46f669---42035680263.pdfIn PDF document text
    • http://toonesk.com/upload/8121746178.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/bba5724497d5b1ae727aafdc15e365bf/fowurebipajikudapunib.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7f6569900---49412410099.pdfIn PDF document text
    • https://securitydm.com/slicice/file/xusudexe.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9a20c196d---24148648193.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/79262566933.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607614fde0f12---dimabasuwenur.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/josot.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070253e5059f---sodupowepuba.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/72015937753.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/0948e58f85c8148818d04c9b9a5a9cac/21535852622.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/8607709457.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_off0000dfed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FF 17148 bytes
SHA-256: 67b076b88b5cad1890f14ca67df79057eabaabcbe02da8bd967c23f1fe2abf22
font_02_sfnt_off00012513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12513 10284 bytes
SHA-256: 479484a08ac6e5fe8a0067a76712bac9e8be791b5aa673e821ade8b7c66b37e5

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