Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4bf0d794a13275…

MALICIOUS

PDF

376.3 KB Created: 2021-06-29 16:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 3d122d1e129d9e43bf1b0d173c8b2728 SHA-1: cd901a6d8e5073667e74580038b0de5081bfccbe SHA-256: ee4bf0d794a132759de0fcb594c842f23e6cc903728b45da9c77968555256563
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload storage locations, suggesting an attempt to distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 5

  • 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.
  • 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://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160c9850ccfb25---jemaxujosorunupinonifid.pdf In PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/m1udd75fnqp2ippn5o9sigg187/dabenesikofizidaxop.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff38bd801d---dofabiki.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/48cc0d0a9ac9726f5ec22392b8a69385/dagedazaxakoxeturuxa.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/a8d1e45211f858658f995153c42ad738/86919182429.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8cb1d5015---zulomerexumi.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eca019c273---xonibixuwodefagujadef.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/96760149372.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/97473731343.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/63788003224.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/83578082791.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/pmnl2njp74utdu73l7f2sa4k93/rinamujimesoten.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/zugotajipokanuzamiletasa.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087595b8fa79---revosefu.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/32545605625.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608db4853bcde---latovizo.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/34345373542.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd6260220e---valavomegupa.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/1p8e08h5ji8rp1e17k8ut0b9ua/97156618376.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0f816a2a3---datikarizadanuza.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021060104452155.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d32e93707c---monevenib.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/84526211005.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/modof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=biopharmaceutics+and+pharmacokinetics+by+brahmankar+new+edition+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_off0005655e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5655E 20764 bytes
SHA-256: 58b6c42bbc3a5238bc88bde84b5be95ca256b1f25957be9bcddf5a4a6d1baf35
font_01_sfnt_off00059cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59CEA 11364 bytes
SHA-256: c4683173823271bc758784f83d6f8b8c9a78813b2415163b1b7b472a662739a8
font_02_sfnt_off0005b76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B76B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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