Malicious PDF — malware analysis report

Static analysis result for SHA-256 469093ebab69f256…

MALICIOUS

PDF

82.1 KB Created: 2021-09-01 00:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 94324ab163f4632396ca45c4c094def4 SHA-1: c78f21ed9dd0c8822f59dfeb35dcdf7363558b11 SHA-256: 469093ebab69f256c55cd3ecadbaaf7ea382f7d8dbe2dd46d65153cd1776b971
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it functions as a link farm to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=when+was+invented+the+camera PDF link annotation
    • http://davidhammerstein.org/ckfinder/userfiles/files/xosenezoboroxuvifod.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/ucmfpb973o3hsespl7epts6870/xinisegaxajobofuk.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/06/21/zopuvufaxate.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/5cb5f4cb017a6a715f0a934ff0e0ad04/27948697511.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/15563ace961e8542bb6724c753b50113/74062397040.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/xibobekov.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/031452ad7be04a3fa2db7764a3539004/rinukovuluxulep.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/63124592196.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/bakosuxip.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/sapaz.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d215e45394---purokisoperokuve.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/34445912360.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/27922099752.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/nudoruzile.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/12351350493.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/b1b98d969b57ca932737311aa59e7f08/81846906898.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/50812952256.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/zixazefolizobilizuzid.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/81656102954.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/lazijenogozava.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/zikikeserivenopamuvod.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/volapifil.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/10622051244.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_off0000dd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3C 10616 bytes
SHA-256: d7399c49ece826baa0a6f2fc46da37c14b4ec2159545e21b00067ddbe5a5a6af
font_01_sfnt_off0000f55c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6E 17732 bytes
SHA-256: 5cd9d92bf1435d3cfd0b0449bcd13074be2e1798ac68ab9eaa230a4b140b4035

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