Malicious PDF — malware analysis report

Static analysis result for SHA-256 30512d02c8aa645c…

MALICIOUS

PDF

84.3 KB Created: 2021-09-01 07:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 06a12848078497e0ca8bdb12aaadb410 SHA-1: bf952107bca788bd24cdd777b73caa6af9d38f87 SHA-256: 30512d02c8aa645c14eb79fb6930fa7c47f0be101cbfa972a7a858c29a270333
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to other PDF files, many hosted on compromised CMS upload directories. This pattern is indicative of a phishing or malware distribution campaign, where the initial PDF serves as a lure to access further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/lonatubirumuxudadixaxuput.pdf In PDF document text
    • http://aranykoronakft.hu/userfiles/file/pezawujikaweliko.pdfIn PDF document text
    • http://zaintik.org/files/galeria/files/doragejo.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731a6baba7e---8974954373.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a95d3ecbb98---80576765167.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/64230475786.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/84452922818.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/24332463727.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/ontnp3oi287mous57tvpp0h534/sufarituji.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c5adf058---gisowatub.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f093ac916---defufumejijolesew.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/defimebafateketuxubepitil.pdfIn PDF document text
    • http://chinazzjx.com/d/files/26103597159.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/fopesi.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/87084595761.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/regaxuvuwipelumunakulubom.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/dojaxudigeketivaferu.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a677c7dfc54---81273052983.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112666f3208b---kuzibejefeporitudonosogu.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/456fa0bdf0bc76144a38b410d587c6e7/zoximafitesun.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/xubogafebolitodenoseb.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/60656efa58fbff188de0470035910650/92042729620.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=places+that+spay+dogs+near+mePDF 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_off0000dfd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD8 10984 bytes
SHA-256: 6e743082348cf046ef3c226ca49adae8e8998d240393563f350c31ba2244aaad
font_01_sfnt_off0000f90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001111f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111F 18276 bytes
SHA-256: de969335e82d5c7f0ca990629769680fe237106a04a8907a2cc42f5a1369e058

Open this report in the interactive analyzer, or submit your own file for analysis.