Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a953e9849ae19ad…

MALICIOUS

PDF

78.1 KB Created: 2021-08-10 07:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7751643b9c3c5c3a39b99babe80c83ac SHA-1: a696ad075e20b5db8df3d702ec068eca13d9de6f SHA-256: 2a953e9849ae19ad58688927f24472c82869a254e603786510b853e14aa7ef8e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification also flagged it as malicious. The presence of these links suggests an attempt to lure users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7816

Heuristics 5

  • 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
  • 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://www.avantagesapp.com/uploads/files/jeweverugajefezajixogexe.pdf In PDF document text
    • http://adamlegal.com/userfiles/file/davasusowosukisif.pdfIn PDF document text
    • https://ahha.az/userfiles/file/17933496758.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/belatekisovojabike.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/4cc83828102ca9ec20e7d0a4fc2ebac1/sitiwer.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dba74e122b---zubalir.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/bujapavatake.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d98ac088a---18970219605.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/85797330451.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/47916410262.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/fb7b85b59579d50c793a4ebaae477dae/26813623009.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/6071509448.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609411976b804---16098534938.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/tujotezig.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/jifotaso.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca3bfe6187---nisaro.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/kiresap.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090947df1b84---16357832480.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb49c4b040---38554416095.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/gelejimavoj.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099bdc871778---50905883846.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/pabakolo.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210606071405779.pdfIn PDF document text
    • http://ttc-investco.com/img/files/simalijakofow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+make+slime+without+borax+and+glue+at+homePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11343 16624 bytes
SHA-256: 1f1c0a954d3bb01f94f9f7acacbbc318af666742e80e04e805077264394bc737