Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f34fdc48c02b4a…

MALICIOUS

PDF

85.5 KB Created: 2021-09-04 18:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 39fafd7db2418db5ace7c962996a109f SHA-1: 5e305e7fddbf9c64e63f1cf70d0d9bd9afa9887b SHA-256: 56f34fdc48c02b4a34eaf47fc55301423836a084ec8ea8dbec3f1bc0f76eaeda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable hosting or compromised CMS upload directories, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://queure.ru/uplcv?utm_term=gloomhaven+scenario+flowchart+pdf PDF link annotation
    • http://ohana1bbq.com/uploads/files/22759405103.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/43762990790.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/45ce79b4e9c468d7ebb568e680492948/kadatumepexozonobilof.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/dejiv.pdfIn PDF document text
    • http://hopsch.de/uploads/file/liwekiwaketopilaxazopup.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/paxenesudovenejani.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076708cebc2e---jijepovulosori.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0a042ec4f---zalowuxilunalufa.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/nesipesigujevaxinuj.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/59738367586.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a83760de122---33150476760.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/76083081793.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/borujunizukowoku.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/xetavebadijix.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/99876610953.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e8d7722fdf---solunuzasololosog.pdfIn PDF document text
    • https://sharenkon.com/files/xumemivipalal.pdfIn PDF document text
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/zujokut.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26061645120.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/47628703656.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/batuloka.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/lufogobiluwalenuwe.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae44697e37---lamonisofako.pdfIn PDF document text
    • http://ginniglobal.com/uploads/file/xifimotevubumuk.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_off0000e534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE534 11076 bytes
SHA-256: 07d061f692afea37d4f49e81b234b8da7c915bb70ab00ed67971b0e4532c9b0e
font_01_sfnt_off0000fee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE0 18932 bytes
SHA-256: ac1fa77e2fec316e09ef0fc6b803bddb321fc07ad7d8b5f71a0a2dec82d8cb98
font_02_sfnt_off00013016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13016 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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