Malicious PDF — malware analysis report

Static analysis result for SHA-256 262d762842c90f0c…

MALICIOUS

PDF

91.0 KB Created: 2021-09-16 14:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 64d4ae583d82303637f14b0fb0c37030 SHA-1: 4073b9148114bbd4cd22e7836367f69f54a6ddde SHA-256: 262d762842c90f0c30bef71afa0a298a573c5227f6002f4a003343bf2684c369
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. The document contains numerous links, many hosted on compromised WordPress sites, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://drafthe.ru/uplcv?utm_term=top+rated+live+wallpapers+for+android PDF link annotation
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/5d5c4798e04ef12c700463fe0e425373/xubasupo.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/lukumidabames.pdfIn PDF document text
    • https://interativacorretora.com/fotosempresa/files/41135807498.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/k7b82a7ef59ailmme4ged3fi14/45317469083.pdfIn PDF document text
    • http://kramnyca.info/img/upload/editor/file/sejezedixeg.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ae9bb4d28---xetegejonabogironuxok.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/fupebefutomep.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/7223012911.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/cd24gc55647qj8jvq37d3vkjk6/5238254717.pdfIn PDF document text
    • http://marktoby.com/akram/know_news/admin/userfiles/file/24156834912.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/vufeximomor.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/68581795872.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16137791272133---64947464762.pdfIn PDF document text
    • http://bhartiyambeohari.in/userfiles/file/24419395503.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210907215339.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/35313785874.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/mimule.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/93197880472.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/wituro.pdfIn PDF document text
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/24734522841.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210913155222_3gaika.pdfIn PDF document text
    • http://elektromig.pl/userfiles/file/12275984479.pdfIn PDF document text
    • https://kingwrapcarspa.com/upload/files/lixikixuvixegaputinoviki.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/418r55jpd9gdgdk90su4v8ni7o/newenenukizuwesifob.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_off0000fdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D5 10604 bytes
SHA-256: 2559a2c6c5f4a357ec14069ee2ad57f96e6263499d6e4812f3017683bdfc5d38
font_02_sfnt_off00012e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E38 18604 bytes
SHA-256: 08511a61dfdbc5d4e94d6fda02d596e73502694024843739782ae81d9b416f1b

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