Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b07894d99b9e93d…

MALICIOUS

PDF

105.0 KB Created: 2021-06-25 23:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 77a4f2e9552b76033e7a419cefd3fa13 SHA-1: 135466246d7a62a6ab28b08988722b441f66f442 SHA-256: 9b07894d99b9e93d77cd8a6d7be8f9640b4964ee084ce03514ac8d428760fd2a
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, many of which host other PDF files. This suggests a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for distributing further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://unique.global/wp-content/plugins/super-forms/uploads/php/files/998976993aef0a5c21d50569da08890f/5069186232.pdf In PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/ruxinevaxexabajomenodot.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/cccd6ada6b0bbbc36929022ee13d7699/69628067881.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/388cc850e39955d54d8be87449e31396/zimasugolenukomejojobuna.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a4048a066---3201946260.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608126eb87205---sudofiketekolodu.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a1ff62552---kuzanekanugamexivobukaj.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc71366aafe---94181441444.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/7a9677350d8e3320ee4bc993d36c374c/41934065479.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/fakosezutegugeladurefit.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c22df1a6c99---voperifurezugagepedomez.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b29d3d6638c---91967081324.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/lopamivanokatubunep.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/33gcrn8cuif0aoeng84ojc93o1/genewe.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/df47cc3fb74cac769411eb3541f38340/26541364080.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/jofozotuxex.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/sajiboxibi.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b7cb0a5ce---vamuxixitovuta.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/50f1488867baaa59f6e61a96dc220cd6/11180192699.pdfIn PDF document text
    • http://lafayetteconnections.com/clients/52818/File/dolijobuwuvotixoj.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e19afcc5e9---65902119642.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d411490f5---31859101068.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/ad9kbsg0o2l7q3pbg2jusm3lmb/jigaredowizu.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/e652e63164a9734de61a255ffac21233/nititimosalirodinupiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=dickens+ignorance+and+wantPDF 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_off00013a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15286 10680 bytes
SHA-256: 315095b5410de5a2e9212b1004583ae3c3eb3f43d3de5bc02a8ade713d85de41
font_02_sfnt_off00016b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B0D 16836 bytes
SHA-256: ea31722f67bfc351a761638c2127aa71b78e20845a0e3002a1a79e4f6e049689

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