Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0cb1ba12bb7829…

MALICIOUS

PDF

125.0 KB Created: 2021-08-08 19:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ffe7ca4c02b1ea6380a3e8dda966b577 SHA-1: 734ac19c048a351b0d66fc4fcd0150658a9d7623 SHA-256: 8f0cb1ba12bb78293c8e7d73fa3d200ae4a179339255c11cb70e7cdb63da412b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The PDF's structure as a link farm suggests an attempt to obscure the final destination and leverage potentially compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc08df257a---wuxeretadodisudosun.pdf In PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/412f2dd6e6c02ea4ca8d781bf0d1d9fd/58212798467.pdfIn PDF document text
    • https://service-panev.com/userfiles/63992347249.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16088bf669d0a8---temewininonijojezuvilot.pdfIn PDF document text
    • http://citescolairedeledit.com/include/file/pasabadiridetobutonaro.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/3598aad5a7c136e55efd2b513040251d/kepafexuxitaxobobudap.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/tejedimajetubeb.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160fc00c900650---revilo.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/18620213438.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/631u9mo89mcc18n8qqmo95tnv4/61841716716.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/v46at1kb4fbg5ghdsgk37esrv3/70305993552.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f34b4213d1---58215505150.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce9766b99f---29727611875.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/tuzezujutaxorekowozapu.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712b37ae118---20122774011.pdfIn PDF document text
    • https://innotek.vn/uploads/news_file/12433312915.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cabb93fc6f---kexeranovupa.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/tomugeredajefajamovudegal.pdfIn PDF document text
    • http://fxmeat.com/upload/file/233add2c1fe42e8b0f6c230ba9224921.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/6a9aa110cbb9eff18e01698d58eb7e37/fiwumixusiwedeluganilide.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/budebegopexavume.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=john+deere+gator+6x4+service+manualPDF 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_off00018481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18481 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00019c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C98 11324 bytes
SHA-256: c4181debfb9730bcf92d98a99913acfda323069a92fbcdab769030b80c867223
font_02_sfnt_off0001b6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6FA 17732 bytes
SHA-256: b159fb2c81cc5eb7245fa8c0b7f7107723e85a5e2f19ded24560a0ddffecc11f

Open this report in the interactive analyzer, or submit your own file for analysis.