Malicious PDF — malware analysis report

Static analysis result for SHA-256 154e0d6ef54e52a4…

MALICIOUS

PDF

85.2 KB Created: 2021-08-08 16:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 9544f31353c0c8ab9c0d5566729cea31 SHA-1: 0e357eb3ba88e3bdddba7c100a19654ba243951b SHA-256: 154e0d6ef54e52a45f8a8d6d00f02753cac197cd26191453dfa819ba32d83e37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS upload directories, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed4c86bebe---sulesakazisubopofajof.pdf In PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/bu62tm9p82rlgkehik8uc25tcr/sesezone.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/dipofonisujololif.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/9099507113.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/7ac754530fe06808b168a8ac6cdc76f9/zemodulinarunawananage.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad835ae9e4e---gugemejibikiratitolu.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0acc42609---xowipapobo.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/a2ad1f0d5145cd0e168118bf83f47917/lesemidewudobija.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e819d4758be---23878294952.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/wemidosi.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/o4q5krugaje8r9sjlum2ojuljc/42770680011.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/xateranonexexo.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/3501f43cf5da1f9bbc26cce004d404f7/67301978981.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/cb41ebf317ab300b76b49badf343252c/zifowewafogomibo.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/kesipuki.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ja0npcdjn2m3l80qgdqlv62gn7/paruvuse.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc823b8b78---81817301210.pdfIn PDF document text
    • https://avela.md/userfiles/file/sitelerigawogugabasu.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/96954773103.pdfIn PDF document text
    • http://suacona.com/clients/16856/File/kerizejasirolirenija.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/rojuze.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/kamamanos.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/51193487481.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/21755486062.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b8a40df30---71547364348.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=inter+1st+year+book+pdf+2020PDF 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_off0000e806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE806 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001001d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001D 10944 bytes
SHA-256: e8ed0d1755bf7c0cb3effa0f3cb94aa3291e98386d1f2bbc4cf4ffb8755f0c62
font_02_sfnt_off0001198c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198C 17004 bytes
SHA-256: 3e06038ea0293a46f3010d5b21de01b86cc66516e2a13a92b0b827c6c4589911