Malicious PDF — malware analysis report

Static analysis result for SHA-256 02975f3540310def…

MALICIOUS

PDF

89.9 KB Created: 2021-09-16 23:29:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3ce6195879ff52e30761aed817a727c2 SHA-1: d36a8d91cc8d8042df3c23c0aa5a698527bfe21b SHA-256: 02975f3540310def96bb3ac372337130882f98c579314f6fa5a4a3451d3a0188
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links to external websites, many hosted on what appear to be compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fubisew.pdf In PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0ad52056d---boregugogezudobo.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/161335fe3828da---fupetivisixedar.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/93863666963.pdfIn PDF document text
    • http://homearcky.nl/userfiles/file/2337737192.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/88863798937.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/denuluxotigukijo.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/rugadalulefipig.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/tesesen.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161324151b7989---6825169865.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161412ab7ce03a---76606939890.pdfIn PDF document text
    • http://phuongdonggolf.vn/app/webroot/uploads/files/tivomatulufatapokitana.pdfIn PDF document text
    • https://xn--49st2et51duvk.com/upload/files/dinemegasibaza.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/41044707434.pdfIn PDF document text
    • http://studiofelician.com/userfiles/files/wisobak.pdfIn PDF document text
    • https://avphunter.ro/ckfinder/userfiles/files/mopevel.pdfIn PDF document text
    • http://capital96.com/userfiles/file/majufevogagejirilanig.pdfIn PDF document text
    • http://ktcyy.com/ckfinder/userfiles/files/77875824714.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/tuluxoko.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///35567823168.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/24300819136.pdfIn PDF document text
    • http://asupuro.com/user_data/image/file/xonenopeletonajexinikefa.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/fewunirulejujilelesu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=android+turn+on+without+power+buttonPDF 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_off0000f91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91B 18956 bytes
SHA-256: ebe764c94756b7edefba2c0b6b838295754631b302bda49ac885efd591a1a836
font_01_sfnt_off00012a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A48 10420 bytes
SHA-256: 2fc1694bbe99be7b184371be5ec5addc7837fd18737503e93c9887ee25d6318c
font_02_sfnt_off000141a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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