Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c60e7b2a640a185…

MALICIOUS

PDF

94.7 KB Created: 2021-07-22 22:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 35e87196bb777358357036c6cb00eafd SHA-1: af21312cf1aefaf87c4f45a830d9da718a358e94 SHA-256: 0c60e7b2a640a185ea96134904964b8f16b0b45832340d5b88aaf18b127b5af0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and embedded URLs are indicative of a phishing lure, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5f400664e---wakunuboluripajanufobej.pdf In PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a59152a4d8---rutobulivolafudal.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/jijogow.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/nuvapidudurafegetedojadaw.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/2bd2d881bed24bf3554b2828f917b9ad/doneto.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/gaxubibejiximirigowo.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/b54fb5e39479f7784beac014a1fa5b35/74402782016.pdfIn PDF document text
    • https://area5srl.it/file/suwixaludawikade.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/27747377560.pdfIn PDF document text
    • http://nakatka.com/files/file/14954721685.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/rejupufuwevafefi.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4b06c437d---1059385237.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/buwuzawufenubomufujimuxu.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b465f288a96---62890268958.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/59002976393.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/mokizol.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9bd08837e---90760456122.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9fbc5d3a99---kosuwekanigoxukagibipi.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/13cda2caaad599557a5989b57fcc66b0/5079871488.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/mapixujoxazupeguf.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/65733ce022a616289afcbe42075aba54/fivupe.pdfIn PDF document text
    • http://alvitraders.com/files/91252365614.pdfIn PDF document text
    • http://edumedcare.pl/upload/files/92587948533.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/68558513708.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609aabb06970e---22470865876.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/488922f8b435b8be117772aadc3494c8/wuziwet.pdfIn PDF document text
    • https://actor-conseil.com/files/file/34206086845.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075b9b9be613---ziletiriputos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+make+pastel+pinkPDF 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_off0000f8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B5 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_01_sfnt_off00010ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC1 10480 bytes
SHA-256: 26f5117d4166e5e2f440a54ca2d667abc2561917e33074fc24d218d148643221
font_02_sfnt_off00012692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12692 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA4 17368 bytes
SHA-256: 420213cf3740affb04973920a937d3948e58013dfd6afe7f80105a8c4708f489

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