Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4680bd6b9b710d1…

MALICIOUS

PDF

79.1 KB Created: 2021-09-05 13:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6257b1b47246caa15c73630c110531f0 SHA-1: 967d2cf9e8c85167da8d98e88afb13be585ca4c8 SHA-256: b4680bd6b9b710d13b6f766fdd86c36cfc2ded3dd2f535e63c3d6b3ab486bf80
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • 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://ilonew.tasksplan.com/userfiles/files/55483872663.pdf In PDF document text
    • https://cailux.lu/userfiles/files/gerimefopivaseme.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160831ccae37b0---79257608779.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/lizodagogowizabumadoguvon.pdfIn PDF document text
    • http://surtek.biz/image/files/20150202_133658.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/caec80d6c421a92534d37b5e10def263/ladilubigazimatudesizef.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e889e95c60---26006825077.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6060eda8d7---mulowopudirexaledasanasi.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/14a0399c6ea71962aa58443f40fd07ee/pixasanuwitajepe.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/82422024025.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/83744323230.pdfIn PDF document text
    • http://thaide.org/userfiles/file/51628328027.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/76270611476.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/3ajhnscdick20648ksbv7bgbls/47945694959.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c1261972d75---dedix.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/monalawevatifub.pdfIn PDF document text
    • https://kede.org/userfiles/file/bogoxemuxafutekexavefe.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/9skrtnk3dmu5c2epc0abupn2pn/sajijuwuvexoxedefinef.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/40128452258.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/54577666540.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/7b1s8s6f3da0ea66t4a4k9p3r0/36651457097.pdfIn PDF document text
    • http://96rangjai.com/userfiles/file/12130630052.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/94348217070.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b017e6c055b---38873687146.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/9118124870.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=nucleotide+synthesis+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_off0000cfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FD 17784 bytes
SHA-256: a27392ff1a85fc70fa96b6bd1011a127840a6ba73f393783119dd4be1bda25c8
font_02_sfnt_off0001165e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165E 10644 bytes
SHA-256: 50fb5034f44555e07cdf55692afa2fd57836f68b194e07f7857614178f0c1268

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