Malicious PDF — malware analysis report

Static analysis result for SHA-256 6faac1e97d4ee298…

MALICIOUS

PDF

83.1 KB Created: 2021-09-19 10:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ee241fcd3c0e992c129b8aa66817a225 SHA-1: 1e178227d1f27db0f2626a43bd0f06ddd41d99dc SHA-256: 6faac1e97d4ee2981c8d8809c0f53840aed1199984213ed33299677b4e4532ad
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also features a large number of external URLs, many hosted on compromised websites or disposable domains, suggesting a link farm designed to redirect users to phishing or malware distribution sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://synerhu.ru/uplcv?utm_term=the+princess+diarist+pdf+free PDF link annotation
    • http://agriturismolionsfarm.it/userfiles/files/dezorowugumako.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/falutifubirejajufi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc1b929eed---71085265424.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/66919584602.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/69515820846.pdfIn PDF document text
    • http://sino-web.net/filespath/files/20210913130830.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/62902977975.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/namoxoxopatezagedaja.pdfIn PDF document text
    • http://novichiha.ru/pic/file/xujugamul.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16135c1f26a7e9---73933333490.pdfIn PDF document text
    • https://ruxthai-guesthouse-chiangmai.com/ckfinder/userfiles/files/61899924678.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/8449809213.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/96241161893.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/36422822851.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/71594911540.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/tutifor.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/7n6itg3idqavhn0duc2quh4f44/pewimuf.pdfIn PDF document text
    • http://93564497.com/userfiles/wudakopopokij.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/berip.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d950151733---37698377869.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/rizabefotonepado.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/77045201116.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/viwaxerenivokavepusizipak.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_off0000de8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8E 10512 bytes
SHA-256: 8b17f3bccf6ccda444a9a7f9c8be964125cacb8dead8e6fa3951531a0bb3bd69
font_01_sfnt_off0000f66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7F 18356 bytes
SHA-256: 5009f8d7877de46e2b48b13848940ce021cac8615a407fa5c8ac8a04c4bbf481

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