Malicious PDF — malware analysis report

Static analysis result for SHA-256 59706ea08d32b2bb…

MALICIOUS

PDF

79.5 KB Created: 2021-09-11 21:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8af09a6edace229e7534fb4e92281c6a SHA-1: 8f3a25638e30aee13d153f7ca6e991be1a6c4f5f SHA-256: 59706ea08d32b2bbf63e6fa2e20f231a2b35c14dac19e865c22cf864bc2bcb88
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many embedded URLs pointing to compromised WordPress sites and disposable domains. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://langeline.com/ckeditor/upload/files/ditulapitap.pdf In PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/lusawuluredevasiz.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1612edf613864d---zoxab.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136206fbeb87---maruzefonezerufigegibe.pdfIn PDF document text
    • http://vln.nl/files/file/97814130731.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc7874ea17---56977584358.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/jazabujidokawifa.pdfIn PDF document text
    • http://nhakhoauytinhaiphong.com/upload/files/80298118695.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/pepajojefuduv.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/66718360045.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/45653031304.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139914214c4c---28898673915.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/1896841040.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/duwibokojituzarotiwikewiw.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/daguki.pdfIn PDF document text
    • http://mmsmarin.com/imgimage/file/dativogojejinazitefuke.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/fosunoledewadulux.pdfIn PDF document text
    • http://aspbae.org/userfiles/file/ginizukopisudufodawomuve.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/sebopelejapisom.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/relubikolexivotikonu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161373fd1e1326---kunubi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=lite+apk+latest+versionPDF 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_off0000d40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40C 17344 bytes
SHA-256: 93154a8d6fd501a1c05b70a29be726b0edf9bcce98dd2391c8f54e31101dc48d
font_01_sfnt_off000100df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F6 10360 bytes
SHA-256: d70c3ca0e6297956864137449150000568d4fe304a934cee99a2eeba9a387f73