Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c5eaf64314cbe0…

MALICIOUS

PDF

112.7 KB Created: 2021-10-13 07:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e9489a569ac482ccdf00f9fe376d987c SHA-1: e8258df2ad5ca676cd230645592683b5ee467987 SHA-256: 14c5eaf64314cbe0362b52c225036295bfc9cd9ec5d1aa1bb302d7ea17fce2e2
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous URLs, many of which are hosted on compromised or disposable domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns are consistent with a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://perfumes.dropship-tracking.com/userfiles/files/zisowufawupi.pdf In PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/midogalazaraboxujatu.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145c2a1749e6---47748060106.pdfIn PDF document text
    • http://chromoink.com/updates/file/kewabogiviguriruvu.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/15163738395.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/netujizexijadusoro.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/5c93ec8be842f5b2d6674b2f0e4779e9/pagoturiwikowabupinakufa.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16162c8adde1e5---68467983605.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/1qu8c3pt8iuet9i42ctemr10c7/94601493603.pdfIn PDF document text
    • http://www.perlodrink.com/documents/wuwuwikuzuvijuritu.pdfIn PDF document text
    • https://songhongresort.com/img/files/litonudebamor.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/2aea14cb0f42bbe701430dd6948e56ca/loxovabanupe.pdfIn PDF document text
    • http://mylodge-naoshima.com/48418035705.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/lexuvevivevaxup.pdfIn PDF document text
    • http://mayjack.com/upload/files/pogag.pdfIn PDF document text
    • http://giadinhmedia.com/uploads/files/xitenadekivoludufuxavapu.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/sibafijaturagozafim.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/66934108383.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/21542528173.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210921051840.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/rotumavubumivogef.pdfIn PDF document text
    • http://infinity8talents.com/userfiles/file/tonadesukixoramojoni.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/nekigewiferomonefoxedapaj.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/cmwvf4RlXg4/uplcv?utm_term=architectural+forms+and+conceptsPDF 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_off00014aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16300 21808 bytes
SHA-256: dd02b1b422bbf411e2b37cefd4d387403da9f2e120d41313e48338fb7f30f244
font_02_sfnt_off00019b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B9E 10964 bytes
SHA-256: cd7b1d08b1fd173a5e71a7a60fa3ad793cb9fd3a60ff15c1e146f33bc61a5d7b

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