Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86f7526a0f2492b…

MALICIOUS

PDF

75.6 KB Created: 2021-09-10 05:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d3e7291a3f8507b4ac08db9b620ebcc7 SHA-1: bda5b68d8ab7d9907c041bc62103e2d2e0df32ea SHA-256: d86f7526a0f2492b38554f5927af9ea2e22044d852f5f21caf0ad1906e817578
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. One notable URL, 'https://inwebjor.ru/uplcv?utm_term=watch+one+piece+z+online', suggests a lure related to popular media. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=watch+one+piece+z+online PDF link annotation
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a64a6223d7---68357364674.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/36845943394.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/betixuxib.pdfIn PDF document text
    • https://shipnhanh247.vn/asset/files/zozokipumuvejurapa.pdfIn PDF document text
    • http://stepasidemedical.ie/images/uploads/file/rilizotedidezepavovulore.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161364b7d4948c---8712369750.pdfIn PDF document text
    • http://schokofontaenen.de/idata/84237153597.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a86e53860---jejum.pdfIn PDF document text
    • http://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/febenexatu.pdfIn PDF document text
    • https://zibarajabi.com/cache/fck_files/file/vewomanopuguzex.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/bidoxikif.pdfIn PDF document text
    • http://mxag.com/upload/browse/file/kamaneremopo.pdfIn PDF document text
    • http://nineslash.com/user_file/file/xitilolaj.pdfIn PDF document text
    • http://primeasset.hu/fileok/file/9798464741.pdfIn PDF document text
    • https://ietc-oman.saktoon.com/userfiles/files/bizofoladegaxunibuz.pdfIn PDF document text
    • http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/80904767556.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210908064749117.pdfIn PDF document text
    • http://studioarchterreni.it/userfiles/files/kupiw.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/46637960869.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/bajoporoligalopekazufesix.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/fusamobupezojame.pdfIn PDF document text
    • https://rwd.webseo.tw/upload/files/67339774041.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/sazukatofu.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/49174014748.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///kimoridisunafodur.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_off0000c53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC53B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4D 16720 bytes
SHA-256: c93ddd7e786862cfc30b9b2438045d008b7c33bab687cfac98377b43624c9f73
font_02_sfnt_off0001087e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087E 10256 bytes
SHA-256: 349ccbeb46e75822f91a26fdb5bf19943158dcb4981d9d0a21c6dd17f6fa89b9

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