Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d8cc23bb2cc1a0…

MALICIOUS

PDF

75.5 KB Created: 2021-09-20 08:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 65312c2ed961e97625f4c3e771b9503f SHA-1: e733172f9d3cb4d2ab9381dfa648f7b8914b6d65 SHA-256: d7d8cc23bb2cc1a0ad3cf0e1241d33770690a1e404472e55b4eae8302061888c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to PDF files hosted on compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly indicate a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://manajrgvaaradhi.com/cms-uploads/files/45086727362.pdf In PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/ea869d1983e0f44f2da2c0ab0f7fd0cd/ranitobewo.pdfIn PDF document text
    • https://tlkingatlan.hu/kepek/other/file/30224335885.pdfIn PDF document text
    • http://phanmemerp.vn/attachment/files/55916529581.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/39774256818.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/tigubexuforo.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/2167451005.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/zujapasudaduzewesu.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/dekopigoduwiwewegan.pdfIn PDF document text
    • http://avtosfera28.ru/userfiles/file/78729387791.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16140290672694---66046002292.pdfIn PDF document text
    • https://phukienbep.net/media/files/finedi.pdfIn PDF document text
    • http://www.klimavill.com/data/editorfile/98348471165.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16132e484f0c83---87094541460.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/kusaxutekuwalarimevit.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/jejufakazija.pdfIn PDF document text
    • https://badrivishal.com/media/25158635898.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/c3517af7d254a170fac7816e49e4e522/48459125941.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/gawesoxo.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/47733109842.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/peditekufe.pdfIn PDF document text
    • https://testgit.begurholidays.com/uploads/userfiles/files/sefejoxe.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/pajukara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=suraj+pe+mangal+bhari+watch+full+movie+onlinePDF 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_off0000bd51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD51 11356 bytes
SHA-256: 51ad4f51a49d55c5a89f614c9b1c3ba747fa4ee43c6906f68cf580f13d6f0976
font_01_sfnt_off0000d7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AD 18556 bytes
SHA-256: e75aaa1870c18e8fd87a494a2ff586f9ea490abb00c748686d51bbed9274a40d
font_02_sfnt_off000107ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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