Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e59206927f8c61e…

MALICIOUS

PDF

90.5 KB Created: 2021-08-05 14:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 504895395568e8c2d83fad1e0af63705 SHA-1: ef289e9bd5c01050eba8591de8ed55b09a20cbc6 SHA-256: 2e59206927f8c61efef41539b54a815133c1eae6497e8cb8597226ad1bcaff79
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the URLs suggests a phishing or malware distribution vector, aligning with Spearphishing Attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=los+4+acuerdos+de+la+sabiduria+tolteca+pdf PDF link annotation
    • https://muahohangnhat.com/app/webroot/uploads/files/binajezofebexalakokiz.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/kadoxukugolul.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/5104923249.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/futuworivov.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/21754799767.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/ddno23d8nb8pmjgjrpsn02gh54/34377348303.pdfIn PDF document text
    • https://cecprint.com/images/file/nipewa.pdfIn PDF document text
    • https://basisangka.com/contents//files/55119221417.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9add03c68f---wafuloparinanuzudon.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/e3bb7b884ea71778134afdb3201f3861/45945787168.pdfIn PDF document text
    • http://carszana.com/image/upload/File/31572364336.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afa8659f9a0---91585049986.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/15214416769.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7be2d7cdc---98649413673.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/7a9e7423877f3089bcc8525a1e1d3908/41017226029.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/00b5f02e637571740006d74188bb3117/jerigeganin.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/8aacbj3v0ifn7tqiv54cvopp7o/woluvilowibedo.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/refazekodosogumet.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/mikazujutepanaw.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/06/03/walevuzevojufamozenudap.pdfIn PDF document text
    • https://cargotavio.ru/files/file/vorit.pdfIn PDF document text
    • http://hanifeugur.com/image/files/sufepakuniwavalu.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_off0000fa59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA59 18248 bytes
SHA-256: 1351e7b8cd9ce1060d51c32a25a9239ee0a0f496529a58d71edcbca04e10ed1b
font_01_sfnt_off000128f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001410d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1410D 10784 bytes
SHA-256: 3c322bb4eb691a502075d8827206648a2de73cf6db467937fdd35676a2f29172

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