Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d47c7aad792ddc8…

MALICIOUS

PDF

77.0 KB Created: 2021-09-06 06:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 64753fbc29d50918f131715f14d8d8d2 SHA-1: 781f2738c152b3e53fe56c64e63ff80c0d34f70c SHA-256: 5d47c7aad792ddc80b86ee4c743769a1160ee5e317c22ad054d0c4d5411da524
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to PDF files hosted on compromised CMS upload directories or disposable hosting, suggesting a link farm designed to lead users to malicious content. The presence of multiple external URIs and the nature of the hosted files indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://apsencollege.org/test/fckeditor/file/tirurulijopudorenedogod.pdf In PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/rinadanopiwapimebidudoz.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/77703620379.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1606f423e3cd82---6988433485.pdfIn PDF document text
    • https://taipeitccia.org/CKEdit/upload/files/49934918596.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086919075216---segaxowoxa.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bb50afa8f---42599138083.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/setb8ttdl4gekh6941c1s4qo30/jikagam.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/288f35b860cc8edf25028f8014c12604/nofewawilexi.pdfIn PDF document text
    • http://sireny.net/share/files/kibativijomifiwukedi.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/65c43493bac76b8a1847341c06371e2b/38496616997.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/wewikom.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/ruvotub.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/47444273389.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebfb1ce52f---xamujezadi.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/pezotubibiram.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/80280263621.pdfIn PDF document text
    • http://sbkf.org/files/files/benadutowa.pdfIn PDF document text
    • http://ssss-sangam.com/userfiles/file/jegenosijabet.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/jalivupajorobo.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/69878570041.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/50275451813.pdfIn PDF document text
    • http://disonde.com/filespath/files/20210808084828.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/fd7cb204b04851349bbbd56e508874a9/xivovexazujukuxigaruvuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=toyota+corolla+2017+gli+manual+price+in+pakistanPDF 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_off0000c779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC779 11328 bytes
SHA-256: 11dcfa23560b302413750ffabf545fdc394685673a695a3595d4e43ec61a9fe1
font_01_sfnt_off0000e251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE251 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA63 16948 bytes
SHA-256: d1d3785758df1407ea7330e5b3e957e19d274579f3234ca8608216ab1b55eb58

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