Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e6936e15bfdf25…

MALICIOUS

PDF

83.0 KB Created: 2021-08-31 02:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3be72c94b679eb88011cbe7257ebc053 SHA-1: 464d738ef0214f4b099fe2265053053f6d4aa7c6 SHA-256: 98e6936e15bfdf255be04946aad6721ccfbc7770fb51416648c51638f36652d4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous URLs, many hosted on compromised CMS upload directories, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the presence of numerous external links indicates a likely intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/6b9394d8870b01a19bb443ce56bb271b/70826208068.pdf In PDF document text
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/werimedasojo.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/razogogiwaguvasuxoxunum.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/revonutobugalexa.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/ukt9n80slek1m4oiajspkup755/zivagotezesosaneju.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/90573736952.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210707194544_1796422436.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/45646561818.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ea3f2380b---503681254.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2033d3b37f---lovudobizegitenama.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/66178869670.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd4b5e597d---fokifesaxezijusevusu.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/38934547773.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/vegalerodolamirufatazefi.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/nutadufujajomejuwewi.pdfIn PDF document text
    • https://tivicom.vn/upload/files/poniviwosojojoboxix.pdfIn PDF document text
    • http://jsqnchem.com/upload/files/77434666416.pdfIn PDF document text
    • http://premiercontainerlines.com/media/ftp/file/rifowamaxumufijajipop.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/57658057ef171815a52942d5b92c59e2/munejugasilorevezapuw.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e18080e949b---72094687464.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/71363045219.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d6c5d7103---ziwanegemunuzub.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/wazizolegez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=the+emergence+of+industrial+america+worksheet+answersPDF 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_off0000dec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D5 17572 bytes
SHA-256: 07ff6c9ab6e8c247baa6a3822b803dcd386905d4b5851a7de720e4fdb97ba604
font_02_sfnt_off00012452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12452 11164 bytes
SHA-256: b47e55db9b2ec9d97071efd09cca992d0159347868d3baffbc2a302b3cb25ca9