Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbdac0912f37ff7…

MALICIOUS

PDF

92.8 KB Created: 2021-09-19 02:54:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 22bb9356e2519eb667a3904eb3a0a406 SHA-1: 720964e73acb0da626d7f6493b45d805a85ffd63 SHA-256: fcbdac0912f37ff72ed7e25c2fc7ac6a69ae954d6a826c67c3bf75f5daf4b7f1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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.blondel-bois.fr/ckfinder/userfiles/files/25288986418.pdf In PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/larutedusejifuf.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/ue1je865kharla2as3rcne4qoq/30780086791.pdfIn PDF document text
    • http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/lofazaganewiv.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f3a45ab5e---nutezanob.pdfIn PDF document text
    • https://www.ocnistudio.cz/ckfinder/userfiles/files/nitakif.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/sidefuwofuvujojarus.pdfIn PDF document text
    • https://temahr.hr/files/15013310835.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/zones.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/57298037913.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145d5b32297d---lupawesabota.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/molafivesivemamij.pdfIn PDF document text
    • http://strelnicebudejovice.cz/userfiles/file/xaval.pdfIn PDF document text
    • http://oris-am.com/editor_up/raforuji.pdfIn PDF document text
    • https://qwert5.com/psum/admin/userfiles/file/84068716808.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2021931111116592.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/560aeb424000b0586242c576166e0eff/1827485329.pdfIn PDF document text
    • http://hmed.vn/upload/files/84459514584.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/tonili.pdfIn PDF document text
    • https://contemporaryteas.in/admin/uploads/file/xisasew.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/kofaf.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202109111548544223.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/napixixaxasipolitopet.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109172219523014.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/bimuruxorokasifon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=beginning+after+the+end+novel+pdfPDF 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_off000106b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B8 10728 bytes
SHA-256: ff212b36f190f4c7e33e82061fa4e3f6b06a0fb2602669ea1edf3e52dc7d8f05
font_01_sfnt_off00011f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001372c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1372C 17856 bytes
SHA-256: 2b4e39aadf6904cc0e39ec17f660c35fdd821f30a4859bbab0b3279690dc5aed

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