Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2985b8d86d1074…

MALICIOUS

PDF

74.2 KB Created: 2021-09-04 08:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e06ee290be60962df84ce2b765482002 SHA-1: 517263fb13caa750c08099e181de304a3db697e6 SHA-256: 0a2985b8d86d1074a28ca4820a8c5a68441e9169e9ecfa6ca0a2ce5eb430fc18
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The PDF's structure and link farm characteristics are indicative of a phishing attempt or a method to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kommunikator.nu/demo/userfiles/file///9753393016.pdf In PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/sogabopuvikegijasipaga.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/0dh62lnje826nf9nq6fd9q8pev/63462068759.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/lijrbln1e93l0saj05j6asboqi/sivugoliz.pdfIn PDF document text
    • https://cncunse.com/d/files/kafupejugaxabuxozuwiter.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/gobigujosezi.pdfIn PDF document text
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/duguzike.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/17142853442.pdfIn PDF document text
    • http://attlas.center/userfiles/file/17019761654.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/zolalitidenotuxekutiki.pdfIn PDF document text
    • http://medipharmacompany.com/userfiles/files/27701047485.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609474d649d2e---93615226957.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/l8js8bd6eut3sr4blt45v5t6u4/zufogunuboxegetoz.pdfIn PDF document text
    • https://patc.fr/imagesfile/85847526044.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/371e52a5e9fa3397d9291b8d0256f2b4/62405866929.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c898ed2ae2---zajovuma.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/48059267031.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613062871c3c1---mariruwuleperefisinike.pdfIn PDF document text
    • http://mywymc.com/userfiles/file/wujubifapiv.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/ee20a6b4535016d2dd488dd89c3f14d0/3589449588.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=ingles+instrumental+informatica+pdfPDF 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_off0000ba9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9E 18288 bytes
SHA-256: 00b57e97d009fb33520cd994fb3ef3170b27fc369bbcab1e3bb4c976ca606116
font_01_sfnt_off0000ea45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA45 11012 bytes
SHA-256: 6c8eff47f8f20c22e987858f8eec505295681e3eb3456d3ea83677f454ee94fc
font_02_sfnt_off000103ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1