Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e15408190eb38e6…

MALICIOUS

PDF

86.9 KB Created: 2021-08-16 15:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cbb7840bc68d63acf441601d777d315f SHA-1: ed9b7bf889cc1db2ab0c24c4d43ec4aa3ca61310 SHA-256: 0e15408190eb38e632e03b5584f1b65a27161219351284cd85443c4da8ef3640
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, indicate a link farm designed to redirect users to potentially malicious content. The document's structure and URL patterns suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://antansconstructions.com/ckfinder/userfiles/files/39352178090.pdf In PDF document text
    • http://paramountswimwear.com/userfiles/files/42283536689.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160cc935757f47---nojomuf.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/lqsoosbbhr1o5erdmesum868l4/87661075587.pdfIn PDF document text
    • http://capital96.com/userfiles/file/32218248671.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/96103338209.pdfIn PDF document text
    • http://willismctyeire.com/clients/c/cd/cd1fd5262213d36872a77bd42df049b7/File/7642134434.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210604_A6F3DB691269D73C.pdfIn PDF document text
    • http://vonkoenigsmund.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d219f502d8---45921540121.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f709a2c3622---muvidakatimiketu.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/16919587212.pdfIn PDF document text
    • http://madison62alumni.com/clients/e/e8/e84cd6a5166dbe8c5f6852bff763f4b2/File/nekovol.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/15343508340.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/noxanunav.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608e551dace93---dujenuzebefokanozokeruz.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/3237222040.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/64794363177.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f892bc1436---33389062789.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/tuvatemolukizetori.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a050cfbf7cd---jojedafugonalisip.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/6t3nrdoifv2p743k3ijufvdlq7/nomosevu.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/puvajilosabutali.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/40371549247.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=the+writer%27s+presence+9th+edition+pdf+free+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_off0000ec81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC81 17068 bytes
SHA-256: 1b2b3ad41de8be45bb7c2a1b14b01a1798ee8e45cd210b2a05cdfdc065970f98
font_01_sfnt_off000118ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13103 10968 bytes
SHA-256: e0b4e86c50cc55b3b5edbd7f1d63f17292a3b6fd509e36845ae5c7380e412a67

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