Malicious PDF — malware analysis report

Static analysis result for SHA-256 dceac72e1996ad7d…

MALICIOUS

PDF

79.5 KB Created: 2021-09-13 12:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e4ad41a23e4b2b268089ec0dc573437b SHA-1: bde88c7671e3edeae323b0af90ebe74ef0e69326 SHA-256: dceac72e1996ad7d0b86e3f1394f0e277fbce220ec7767bea217bdb5d3ee7157
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://hrmconsulting.biz/upload/files/morazakugawetimufi.pdf In PDF document text
    • https://praktijk-fix.nl/userfiles/image/file/72054514936.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613e84b68d768---82654613438.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ccabdece5---bigogorabozazasuvizazif.pdfIn PDF document text
    • http://hidropro.hu/upload/31065839861.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/84202582756.pdfIn PDF document text
    • http://pokwuttibut.com/file_media/file_image/file/zovekovojonapilura.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/14729841793.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/84152826543.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/vizeso.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/bamuvo.pdfIn PDF document text
    • https://tranhdaquyhn.com/uploads/news_file/75976509697.pdfIn PDF document text
    • http://schule.havonix.com/ckfinder/userfiles/files/nisolilovapetej.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/robizoritenubufegeruxo.pdfIn PDF document text
    • http://motovelo-nmsk.ru/userfiles/file/xipovenejudegon.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/43830194576.pdfIn PDF document text
    • http://montoaneli.com/ckfinder/files/jefenef.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/27759696964.pdfIn PDF document text
    • http://lovesenergy.com/file/16269720314.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/77447907978.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1612fddedac2f5---52051287481.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/gigefojugarujupurabujili.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=common+room+hufflepuffPDF link annotation
    • 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_off0000d386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD386 17800 bytes
SHA-256: 8ba9f68071585337231047238c22b46c5564b162d39b76ba46f1db4586994643
font_01_sfnt_off000101e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E0 10232 bytes
SHA-256: 572a5851e65353e9bd0b3ce1a748d03539e647165032cdf2c76864b2594e11ce
font_02_sfnt_off00011898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11898 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1