Malicious PDF — malware analysis report

Static analysis result for SHA-256 a454e09275ba2359…

MALICIOUS

PDF

86.4 KB Created: 2021-10-21 23:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d2ccf68b908d9285157c886059f86c71 SHA-1: 3a462225b1b33e05686465415c13796073e5b611 SHA-256: a454e09275ba23591c390ef60ff9b5b1a2f57b58ca57cc27f170c953f1f17ed3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://ezicms.antifftech.com/uploadfile/file///2021101121193536.pdf In PDF document text
    • https://aiwcecckolkata.org/FCKeditor/file/zepesadupow.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161719565604c5---74340621266.pdfIn PDF document text
    • http://damutech.kz/upload/2021/10files/2110040652045522348ranl.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/72355973711.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/sebomikapabevilukimis.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/6746356671.pdfIn PDF document text
    • https://nguyenthelong.net/userfiles/files/bedijume.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/xiloj.pdfIn PDF document text
    • http://wlpp.net/images/blog/file/69838499831.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/sorok.pdfIn PDF document text
    • http://bienbao.org/uploads/files/gowenewijokivanoruvekesad.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109251937335737.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/027dc6d693bfff49721225802f86ff44/86101841956.pdfIn PDF document text
    • http://sportschoolindex.nl/images/uploads/siduzimuvasobavuxotulo.pdfIn PDF document text
    • https://weingut-suppan.at/files/goxatusef.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614048559c8ec---97346365927.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/xobemodewovabagisiraje.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613bca669468a---fidesiluxedufosixuw.pdfIn PDF document text
    • https://finliz.lt/i/File/28874569501.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/sujotefo.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613f909393fdb---zevuxipigekaz.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20211020193340.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/375446eabea0127a2f109884bface262/16747485563.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1615c51f2b42a6---mujuzaparu.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20211007_64E2CB883CC8505C.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/896FEnmJZlk/uplcv?utm_term=letter+of+intent+to+sell+business+samplePDF 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_off0000e9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C5 10716 bytes
SHA-256: 641e5f4bc3f7ae774d52dfabcbba910472b9d4dff10bd5e4a90edc068dc028dd
font_01_sfnt_off0001021d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021D 19108 bytes
SHA-256: 0669606cda7a9a4f41886b269b2c379725857bc600559e9cdc0caf5e4a7f13b5
font_02_sfnt_off000133e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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