Malicious PDF — malware analysis report

Static analysis result for SHA-256 767a9f585f86885a…

MALICIOUS

PDF

74.2 KB Created: 2021-09-22 16:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0a89430ce2890fa991cafd50390dd62e SHA-1: cb8bd70417932d9f52db46406444bf8f67331409 SHA-256: 767a9f585f86885aa1af8b132631e82834beb2e15284259c9d945fde6d6fb226
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm on disposable hosting, with multiple links pointing to PDF files, suggesting a phishing or malware distribution attempt. The presence of a compromised CMS upload link further supports this. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leeandrewdavison.com/download/zujis.pdf In PDF document text
    • https://vinaconexmec.vn/uploads/news_file/bubezesanupetiwaleluw.pdfIn PDF document text
    • http://sun-apartments.pl/data/pages/baluxasonoxujiziges.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/lepox.pdfIn PDF document text
    • https://unitedpetexpress.unitedreloth.com/ckfinder/userfiles/files/rikeweba.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147c6646ce36---76090351587.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16138d17a03ba5---14909976372.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/7ea5ec887cf4a794a0f38c96beee4f15/sizutivi.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/38399637742.pdfIn PDF document text
    • http://01host.ru/userfiles/files/venopenefupa.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/deguponerabekukefeno.pdfIn PDF document text
    • https://hoalavender.net/upload/files/supumolimokenenutikikid.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/18882868390.pdfIn PDF document text
    • https://dauglita.lt/components/com_mijoshop/opencart/image/data/files/50571045683.pdfIn PDF document text
    • https://lemarko.com/userfiles/file/sofofuzukigotoxodotub.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/85939441606.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/65538604508.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/34536847844.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/14820290085.pdfIn PDF document text
    • http://estatepie.com/files/userfiles/file/16387975719.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/79753614939.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/zuxavuno.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/72395676674.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/nemexipaka.pdfIn PDF document text
    • https://sayurhijau.com/contents/files/watawugolugifupesibi.pdfIn PDF document text
    • https://petribax.nl/userfiles/file/goligowerosufesad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=download+lightroom+presets+androidPDF 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_off0000be86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD698 16684 bytes
SHA-256: 53d856275c7fbdd1debbfb64a1253273347e25ac321e9c348a9083f30fa61518
font_02_sfnt_off000101d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D6 10928 bytes
SHA-256: fa63af105e7adca96f6c2224b67c24187fd5a9ae01523a4e944deceec0182f82

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