Malicious PDF — malware analysis report

Static analysis result for SHA-256 9960eccff0fb1847…

MALICIOUS

PDF

78.9 KB Created: 2021-09-04 15:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 46efbd64b8005b0228645e3995227c85 SHA-1: 1f68fdaaf53808f5abfc2db0bc8361ae1da9654b SHA-256: 9960eccff0fb1847586039d2e61896cdcfca0a9508cd8a84f442d31ef33ebcc3
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to external websites, many of which appear to be hosted on compromised CMS platforms. The primary purpose seems to be directing users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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=shadi+anudan+form+download+pdf+obc PDF link annotation
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/npt983ljhr2ocqqd3odjtj1q86/bumupevelesigodejasepafo.pdfIn PDF document text
    • http://apnorajasthan.net/userfiles/file/salogiwagexaxesi.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/xoritutuwoladuwodifonexob.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/b5u3o32nmi5aq6cfgmv3lieg5d/renuzugijudubowojozuf.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/95342876060.pdfIn PDF document text
    • https://actorconseil.com/files/file/votakeboxogaxatuzo.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/7f6a972ee8f0981d86cdec0b508923ef/79531865451.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/39945557097.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/11543282837.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/dalilisajijaxemiwisadis.pdfIn PDF document text
    • http://wasserburg.pl/userfiles/file/vogixowirisaxefizediv.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/a2a7d80373f45f37eaeab226712058a8/3849586183.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/86588317785.pdfIn PDF document text
    • http://www.vnos.vn/app/webroot/uploads/files/96754515690.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a443c05c58---kigigowu.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/937f005be35c5fc33ce81c9c590432ae/76076354195.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/3821462486.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/lofejojugizokoketivi.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/50876018726.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/1c37e643c29faa5e14a70482dfb678f4/domopinipefusemofale.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a65c1027de1---nizebamekotugexutaw.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/08dd2868f0c1d84c6106c3a998c1f0d6/96645471426.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317296b1f10---mevododesolajalafinu.pdfIn PDF document text
    • http://szjglaw.com/uploadfile/file/2021090413205773499.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/bdc41cf52cfb7e6ca5d5812bfbbbb976/mipewefeduxo.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/82286715554.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_off0000c8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DC 10888 bytes
SHA-256: 63917789dbb12f1699efe5b62bdaf06c7c25d7fb3c88e6289c67167ef355ee40
font_01_sfnt_off0000e19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19E 20144 bytes
SHA-256: 00f3c80840089ca78167aff520a9ad5839664a0579f920b20a2a5624de5fe43e
font_02_sfnt_off0001157a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1157A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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