Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a4441f6ebc353d…

MALICIOUS

PDF

75.9 KB Created: 2021-09-05 16:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ca9f9dc6093a1e9a262a780e681e1e29 SHA-1: 630ee418fb34fdfa3e0805abfd8109cb2688f66b SHA-256: a8a4441f6ebc353d326d72e1d68a8a1a2627b55ac7aa4ca3b759043adeb16e70
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress upload directories. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to manipulate search engine results or distribute malicious content through deceptive links. No scripts were extracted, but the overall structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/pewubiziku.pdf In PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/fa2174cc14ae4edc02f88b820db37a77/62883452688.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/42706794466.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/kixazuborulotisunufutivam.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086d2ea9d253---winalopavefimunur.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/49794383380.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/2sem8gv41rgiampn2u9ad02rs2/bifuzuririzomavikogem.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/7jp8n3785ibp130rcnpnaf3gs9/bedulabazeju.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b36fb6448---20640527868.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/voparuzanuzeb.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/zitepixarajumut.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///bunitazunidiluvutekoxud.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c74692dfccc---49850977375.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/fugizusenavakokade.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/8203173074.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/290fc92f7afe0447884cc9377a92c4b4/36660797753.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16081ce75eb2a2---76826700951.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/nefegukipudifigazekive.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a2010a0e7cb---geragofo.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/41110198137.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160f0ae960e240---gatufegibizalirotorem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=admiralty+the+mariners+handbook+free+pdfPDF 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_off0000c4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC2 16888 bytes
SHA-256: 7b08dc3c67cac3e7e0a6818a36b43a157cedfe098a07c1c52dbca19dc589bdfa
font_02_sfnt_off0001085b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085B 11092 bytes
SHA-256: 5a3164e12a2f44019ff1729d4a893b8e9f95cb8d7bd4ec4e64abbcc7314d7cc3

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