Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c0d724dcb934e0…

MALICIOUS

PDF

73.3 KB Created: 2021-09-12 18:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f4fcda90a7360a409bbf1dbf40fc0896 SHA-1: fd5e734b4ca2221486eb072ac336b34601715a07 SHA-256: 12c0d724dcb934e06b3c764ed490d42d9b70630f37cfcac13480668e4bc8d48a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://medvor.ru/uplcv?utm_term=xxzhushou+clash+of+clans+android PDF link annotation
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317f9e9f1eb---livezulakusasilimilinozaj.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/52380245034.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/difiwixudukav.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/10b242c414b59bd763c7896c040fe442/xuxaxesu.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/tuwamanozufagavojatun.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139045a22c35---komovatexepuzeredafu.pdfIn PDF document text
    • http://gkz-crimea.ru/userfiles/file/fifudizil.pdfIn PDF document text
    • http://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/66306803778.pdfIn PDF document text
    • http://hotel-ambassador-nice.com/upload/files/95906335163.pdfIn PDF document text
    • https://tsegypt.com/file/1142990379.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/65841770095.pdfIn PDF document text
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/79186031242.pdfIn PDF document text
    • https://skywaytravelandholidays.com/ckfinder/userfiles/files/bomadif.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161335ab280a8d---daberesilodalibegoraret.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/77537434774.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/bejodovabazepujoseg.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/14368638195.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/redejedubexafusubifet.pdfIn PDF document text
    • https://baobiachau.com/luutru/files/nevajesesanakumajax.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210905165957.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/kawojiramifam.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86487014550.pdfIn PDF document text
    • https://stabiactiv.com/userfiles/file/9580915063.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_off0000bb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB65 17016 bytes
SHA-256: 28753e40680d693439af7ee9f2ef5c30b0b1550e0ce3a92013557c56b5691022
font_01_sfnt_off0000e701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE701 10612 bytes
SHA-256: 6d837a7d47f2108434c25ccd5839652865cb54962b9054a46041c7b4bf38ec61
font_02_sfnt_off0000ff2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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