Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb08ca5d2993404…

MALICIOUS

PDF

79.6 KB Created: 2021-09-12 07:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a59a9f86b7f902c464743c60a65cbe9a SHA-1: 1d5bcae5beb3a718f9b9d2646ace6b2e5f90b92e SHA-256: 1eb08ca5d29934040edb4dc7016d54470c5c28fbf5ed11aa3637c4890f34b88f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to compromised WordPress upload storage or disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish for information. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://allytemp.ru/uplcv?utm_term=unni+ikki+punjabi+movie+watch+online PDF link annotation
    • https://hkpefa.org/editor_upload/file/nenawomonipalapefek.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/34514803908.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/divaveg.pdfIn PDF document text
    • http://grandwatergatehotel.com/upfile_hotel/files/6135364046.pdfIn PDF document text
    • http://net-marketing.hu/images/files/38270697861.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/34af0fc29962eac2081411cdb97eab52/21201423771.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0909/8b436e737ec0a13eb89c85364468da06.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/kavitawu.pdfIn PDF document text
    • https://krossi.ru/images/content/files/55270599012.pdfIn PDF document text
    • http://alhambra.kopanramen.com/uploads/files/68451585764.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/wezubodoroxokakemibil.pdfIn PDF document text
    • https://woft-dining.com/webroot/editor-uploads/files/6026950631.pdfIn PDF document text
    • http://niktid.ru/userfiles/file/bojadamulelewome.pdfIn PDF document text
    • http://fmdscu.net/userfiles/file/wilunomejotovefufedot.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/gipuvimamoruririka.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/nafefenotetalafabi.pdfIn PDF document text
    • http://sungder.com/upload/rodawixejebidokamubena.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/1b99bfec14ee53a4d43de257a52aa004/vixowedukalalavumad.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/b3b97616c0829def5a1aa6bc78de3e8c/42137735933.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/vefodereraza.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/74247496907.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/74710795374.pdfIn PDF document text
    • http://megalaserasia.com/upload///nujed.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/jaxeratesokukisomagofaro.pdfIn PDF document text
    • http://dsagco.com/Upload/file/67194713589.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/domemeputefop.pdfIn PDF document text
    • http://proart.by/media/file/welet.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_off0000d149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD149 17736 bytes
SHA-256: 98051e194473e324c411a606741832218e9268e35cb123d1790db8157e148e0d
font_01_sfnt_off0000fef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11708 10992 bytes
SHA-256: ea54e3e7c797a0e5e073972d2edd2c15e74878feddcaa1b54305fb6f2e904a8d

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