Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee783c7987c423c…

MALICIOUS

PDF

77.2 KB Created: 2021-09-08 22:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8a6a1cd6761e249f94019f297f263274 SHA-1: c0393b55a7ddd8e09ae13f28d7b3a424686cbee2 SHA-256: 2ee783c7987c423cb174dd0e22944dc57670012f2eaae2d4b76986ed787d78f9
194 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple URIs, including one pointing to a raw IP address, suggesting it's designed to download and execute further malicious content. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document likely instructs the user to install remote support tools, a common tactic for phishing or social engineering attacks. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://whatcanidoforyou.eu/publish/file/nukewakidiragoza.pdf In PDF document text
    • http://to-kajihan.net/js/upload/files/zunaluwepovajeloripe.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/rajoranirulebiwonur.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/77649470130.pdfIn PDF document text
    • http://nature-revive.org/files/file/navilisusemuveki.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/33193462764.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/16197842400.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/15793592228.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/rujimamedet.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/8049015460.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef58d3960b---31837572335.pdfPDF link annotation
    • http://szm.hu/userfiles/file/dopis.pdfIn PDF document text
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/35764189139.pdfIn PDF document text
    • http://jawarakreasi.com/file/24698429788.pdfIn PDF document text
    • http://c2r.su/uploadfiles/file/2021090808245573499.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/kirawonesixavavo.pdfIn PDF document text
    • https://ubranni.com/uploader/files/28854809211.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/83228722517.pdfIn PDF document text
    • https://xn--b8qxb801j.tw/upload/files/75258039805.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/f8009633daaceae36828472e04104a4e/71676581088.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/teraxowisonituw.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/dubabowejogelirosi.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/161324f45ab04e---gaxaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cast+cp+to+pcPDF 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_off0000cc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE483 17348 bytes
SHA-256: 3f7ee71814d953c705e399f7f28b373905387db29273551efa89a9d674705c21
font_02_sfnt_off0001113e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1113E 9924 bytes
SHA-256: ec406077d8721b5d272eb3180682d8bb96c2cbbdecfa75273cbe1a18c415cd2c

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