Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5049b241fe72b7…

MALICIOUS

PDF

94.5 KB Created: 2021-08-08 01:36:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7693b418a9e6d5c36392354230fd3b6b SHA-1: 00db940c3f2a5bf402cbf203430d3ebab8ce5081 SHA-256: 0d5049b241fe72b7331a3d7b1d547e83e286d16227f7c4c73c78ea9933cb7647
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS uploads or disposable domains. The embedded URLs suggest an attempt to manipulate search engine results or direct users to phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/d12005b65ac7044ff867ca80afa3ac8b/muwewugimipimukaxeg.pdf In PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a379d66c1da---51547708505.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/93591593432.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60def15cbfa22.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608002682337e---lofunoxuliwazinil.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/89304876037.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210701220355754.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/6kg7s8memoq9gmthmig2832n0c/nawusawi.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/latesufudukema.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/27493090433.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/24514721996.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/58394279312.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///povopisagapufo.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9ca486421---debodefubiseneberasijonor.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba8fa920e7---59187470640.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d642d04fdfa---58081304355.pdfIn PDF document text
    • http://belv.ru/userfiles/file/77214123688.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/c97tjkpihicjilco0s3m9sfj82/kadalerekizinege.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/e1tskj59be7bngmeabfk060pu3/34360535254.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/ppovmo8sg144aa6q5vgj9bql5j/tisaninomawowedazukozus.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aec1146123f---42416740467.pdfIn PDF document text
    • http://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/56409647808.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/zutudusawev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+use+whirlpool+oven+auto+cleanPDF 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_off00010aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA9 10716 bytes
SHA-256: 9bed348b62e48bdc91da3bcbf65b6be3ce13c436ecfa5e9bdd7eeb59c720a979
font_01_sfnt_off00012344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12344 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B56 18500 bytes
SHA-256: 1ec45c452a0bcbd78af9c830d8efcf67e5c775ab7752582fd7d1904b62da84cf

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