Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0e36fd2c9d389a…

MALICIOUS

PDF

86.7 KB Created: 2021-09-01 06:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5a8ff787c4de1cc1bc7f0f8d5394f925 SHA-1: 9054bc05dd319c77dce49e1eb62239b9f01dfec4 SHA-256: 8e0e36fd2c9d389a6305aacf04a38edb298f6394a4a2a46f6794eb564dac619c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URI heuristics and link farm indicators further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://irlanc.ru/uplcv?utm_term=the+used+albums PDF link annotation
    • http://www.truca-taoules.com/ckfinder/userfiles/files/jemukonamujabunizoroni.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/2juthoghcdv3f9kuol6uphd1pj/93033347496.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/5fcedd734b64d4c0af00e0d3022d3508/13058555500.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/razogogiwaguvasuxoxunum.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/lokexelovesa.pdfIn PDF document text
    • http://bbhshipyard.com/userfiles/file/mabopukemonunure.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1aa816708---debozoremesage.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/10203579361.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/xitoritopewu.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/sezovu.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/6928805318.pdfIn PDF document text
    • http://sunnysidehighschoolclassof59.com/clients/867562/File/lezaretigararuvenesum.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/65992957444.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/pepisewizifowet.pdfIn PDF document text
    • http://escritacontabilidade.net/fotos/news/file/66002165028.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/xarawebomubefosazada.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/tanobixufexefebek.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/wunisakenozir.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd340ec4a88---91493810662.pdfIn PDF document text
    • http://congtyvima.com/images/Download/sozoxunafujadejajurabaw.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/ff306f9ced178381d1b6e98a41891c1b/rodiramof.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/bc28771c6ae9b516cdb1955010df8863/sorotifekomi.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_off0000f052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF052 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10869 10204 bytes
SHA-256: fbf5444107e38fa2502a5cb15dfa37fe162c0b95b24d4eaff1a55e809ca1f42a
font_02_sfnt_off00011f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3B 17776 bytes
SHA-256: 1a99651f650f27f1aba3ba237c2d72ff9748df446f5c3145e785e9f66fcdd218

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