Malicious PDF — malware analysis report

Static analysis result for SHA-256 684d6bbae162e1fa…

MALICIOUS

PDF

105.5 KB Created: 2021-07-16 05:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: ad6da771db5096cb18c3ae467c119240 SHA-1: eda9328c0c9088a98948fe5c3dfb484b2463ea7e SHA-256: 684d6bbae162e1fa906473a5e4c2319561fabedb5c1413c69eeec2875692ff54
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The document functions as a link farm, containing numerous URLs that redirect to potentially compromised WordPress sites or other disposable hosting. These links likely serve to distribute further malicious content or lead users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9708

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://laborke.ru/uplcv?utm_term=wingdings+copy+and+paste PDF link annotation
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089e8edcea3f---23081258756.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021070805191429.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/17105122459.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/5a763a0e19564705df62a98943ab2f1d/27426970317.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/tiravowinafuloguwawu.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-4-30/20210430001458182907.pdfIn PDF document text
    • http://ventima.ru/userfiles/file/fekununusa.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/4ki6rasolj2haq2oh2pooh90l4/fajabugazinegumiw.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/78699251067.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/guvaxetumut.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a50ccb947---vaximajofoji.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/towubudigifogowu.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/7cf29d1d184d6f256a38647b940290d7/63131060071.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6a5a642d7---jafimavuki.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/dorazozif.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/89576278241.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/d94ce89fa0fc747c8da8c06b02b08c7c/65368793082.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7620669aa1---nenijiwopoxonevakin.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/lalimuzitijo.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a15d8a61d---90796088070.pdfIn PDF document text
    • http://yljx.cn/images/upload/File/47078880654.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160da1b6e5147f---sajazujilezugotigifo.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec2d7bead7---varevukazepo.pdfIn PDF document text
    • https://latework.cz/soubory/xazawaguwemaf.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607cdac9b9e2a---fitixanememovujasena.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/notololofitavowazov.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE69 35468 bytes
SHA-256: 4d58aef302fc75a6b6514b644e3e8a28f17d1b762a9e73fb4f1f3b6c4569b0f5
font_01_sfnt_off0001401a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1401A 10648 bytes
SHA-256: 6b536c0f812e2360ff5c3101cbacf150bb8d999ae74bc97120e0c3e736edfd9f
font_02_sfnt_off0001587b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1587B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001708c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1708C 23584 bytes
SHA-256: ce2bd94cd250b11ae5367dcc69ce7c5c2120c4135961843dbf09c9fa55c69e73

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