Malicious PDF — malware analysis report

Static analysis result for SHA-256 916fd34ddc4de685…

MALICIOUS

PDF

87.3 KB Created: 2021-06-28 00:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: efde94a1830439f947f16d564482dc9c SHA-1: 8b9df027359a9bee7e3ec1514353885802c2bed6 SHA-256: 916fd34ddc4de685efa315671f20b9d37702020bf78d2a642f64453cec24e18f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to host malicious content or phishing pages. 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 are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/caf58df4327b2f93d5b9434b49d71fc1/vexinodepetaborepini.pdf In PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/129822ab0c5dfb2a3f70fcc1b93d3f1d/32178470153.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/rajenanemedojapazotenikam.pdfIn PDF document text
    • http://waelfawzy.com/userfiles/file/nesatigefajatusawasasiso.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/39640706141.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c242ebd58d6---32492675331.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///supevesonuve.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/wizisololik.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/xoboz.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/n0vq80j0qfhnq2la8dao5fbpmg/ronafuwonopevudemomekoto.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa0d32ffd3---48682641133.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/2263f54bba28b3f82b1ec06dce3919ec/begegakojofixupoxibi.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/13612791044.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa1a289e6c---tumadajenebufixomujejago.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/nomudipegeduger.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ca4d9c5f07d---3689379839.pdfIn PDF document text
    • http://aquatherm-graz.at/files/gafojamumapi.pdfIn PDF document text
    • http://moda-minulosti.cz/docs/momin/file/92631112332.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4dfc5bb2ef---56058711550.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kuwalapogozelu.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/dpk5r8unct69nssll0tfclr5hj/naxubaredalarafibe.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/6883047415.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/lalakesix.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a9813bee0c2---pepewo.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/fpaueif4toimuvv7dga16l6jjc/77796915648.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=south+movie+mp4+downloadPDF 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_off0000f238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF238 10796 bytes
SHA-256: 38bd7d2e77720705b9e1eff51f59e2a7b620f4a2f249c4dd245eb40bce152bea
font_01_sfnt_off00010afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFE 17272 bytes
SHA-256: 32662d7be373e8a049d7e7cb668b92531975da7bef89e3be898a4d40d21f6b7c
font_02_sfnt_off00013831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13831 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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