Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1469f0a40e6031c…

MALICIOUS

PDF

79.6 KB Created: 2021-10-09 00:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d97f004a2de3159e1e63c7cab102d8dc SHA-1: d664d27f7dcffa3034aa5ce8ba2ac5a6016e23d4 SHA-256: d1469f0a40e6031ccd9eacb6a078ad075bc815eadb228a264cd4a105f797a10d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting. The presence of these links suggests an attempt to lure users to external sites, which could be for phishing, malware distribution, or SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://allytemp.ru/uplcv?utm_term=best+stitch+for+hemming+pants PDF link annotation
    • http://mylodge-naoshima.com/images/blog/file/54161357884.pdfIn PDF document text
    • http://skrn.cz/pic/file/xovurus.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/jomojisadevese.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/lawawemobe.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/jivufavowobowi.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/1927249835.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/getubazerukefuj.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/jelekelemobevorov.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156ca9b74677---favejino.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/21131230841.pdfIn PDF document text
    • http://fnathservices.com/upload/file/dubexileno.pdfIn PDF document text
    • http://12shio5.com/contents/files/bugabuduwo.pdfIn PDF document text
    • https://yellowstonewildlife.com/93403115702.pdfIn PDF document text
    • https://noclegsosnowiec.pl/eurostyl/photos/file/3643959582.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614615872d5fb---diwuvegukas.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/majeragozepugupir.pdfIn PDF document text
    • http://shamayachts.com/upload/file/48191115942.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f297b63334---93753480243.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/53111431815.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1615b63600a4c0---52556668307.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/54389gd06hhjtodcct41ln6hq2/81382159942.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/dolajodotatadefabar.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210901161254.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/18932686059.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/wilegizabogekadevite.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/moweg.pdfIn PDF document text
    • http://mtsp.by/userfiles/files/teparidopofavarede.pdfIn PDF document text
    • 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_off0000d036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD036 10932 bytes
SHA-256: 24ac36ced22ced64b08849667bb2eff38a9af8d30d2c730c52d3bf5fe035a3c1
font_01_sfnt_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 17980 bytes
SHA-256: 1dfc067d4aef05c2e9a24b7d2db31d2ea7be5976869b01957c30779e28fedb7a
font_02_sfnt_off0001186f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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