Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9d25a91301feb4…

MALICIOUS

PDF

84.6 KB Created: 2021-09-10 22:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2fc2044f7103dc32018f17bdfe69bd7c SHA-1: 0f0ec22172f52a6fc037df720dc8c876268e9d6a SHA-256: fa9d25a91301feb40e53a68eeca8d757eade6faf207f79886a869fecbc3f5610
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic point to a campaign designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fix2go.info/userfiles/file/saxijefora.pdf In PDF document text
    • https://cmoretv.com/userfiles/40565917863.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/wevusadedededilujoxus.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/39203426402.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/mukoxewolufusokojexiwalaz.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/56928949585.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161384eebc5f94---lexakosalefusa.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/99312742503.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/56354523329.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16138f7be98677---77953696791.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/kifanuzobute.pdfIn PDF document text
    • http://unibox.lv/files/text/31008471442.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/57156190183.pdfIn PDF document text
    • http://futsalcb.cz/picture/vtextu/file/43613891369.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/livoregosewowokumopuf.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/55870370292.pdfIn PDF document text
    • http://pfmconsulting.org/survey/userfiles/files/50958968231.pdfIn PDF document text
    • http://jeanchapleau.com/userfiles/file/10158043448.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021090318245773499.pdfIn PDF document text
    • http://rbc-bezorgdiensten.nl/upload/87663852347.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/wesarisexi.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210909_105152.pdfPDF link annotation
    • http://mclarenquartz.in/ci/userfiles/files/85485341118.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/81278375521.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=fast+and+furious+9+full+movie+free+download+torrentPDF 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_off0000dfa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA3 19536 bytes
SHA-256: ad61511c114ba29267b8160e4fd71f83301d603a394df070c75efd352998d623
font_01_sfnt_off000112e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E5 10912 bytes
SHA-256: 3f353f23e8a4b7c480ef15b033e55fd6b3491d9d2661b8ad774401f109c3f2bc
font_02_sfnt_off00012c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1