Malicious PDF — malware analysis report

Static analysis result for SHA-256 e186a2d73271f3b7…

MALICIOUS

PDF

77.4 KB Created: 2021-09-13 18:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 90ce05b9bc17aff8f78f2945bb567416 SHA-1: b535eccd55f97a183c8e7d1f3802c78d744ba2c7 SHA-256: e186a2d73271f3b72995b858a08bd16e28a591c1d897f623f381806aa6e2b0a8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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.
  • 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 http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/dotupazi.pdf In PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/6d48f2856b2bb40b13f09ea8ec8adf4f/51624600520.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109022059076793.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/fifulona.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109040849241422.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/pitubademenefotedida.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/tisuzogunorarozogadipofi.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/ruvubiwar.pdfIn PDF document text
    • http://bijverhoeven.nl/uploads/files/luluxelajupumoluseb.pdfIn PDF document text
    • https://generalaudit.pl/eurostyl/photos/file/88343448531.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/gjf70dnpuaksgm09puuj7i8nt0/38037149142.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/kitukilutorubujurazujus.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/60046546636.pdfIn PDF document text
    • http://topp.pl/_topp/file/46931339713.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/mitogasale.pdfIn PDF document text
    • http://amunt.madteam.net/ckfinder/userfiles/files/46762296775.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/60723350593.pdfIn PDF document text
    • http://kiemdinhcan.com/Images_upload/files/83484542132.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/72436062209.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/mikazivupuxarojewi.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345e28afa43---13787056662.pdfIn PDF document text
    • https://wigs4less.net/nbloom/fckuploads/file/xarezexisi.pdfIn PDF document text
    • http://otohyundaidanang.com/uploads/image/files/9382325231.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/i4eoa86sd9poi04lvissqltr3p/zimakuwomotobikogipasad.pdfIn PDF document text
    • https://halkapsikoloji.net/userfiles/file/18648609088.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/lewetobawaboxibitamo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=amazon+prime+video+pro+mod+apkPDF 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_off0000c915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC915 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12C 10440 bytes
SHA-256: 3993048b94cf3dfda29f081e4a11dca1f9773f93a404b0251d60ce6a6eeab4a5
font_02_sfnt_off0000f8d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D4 17788 bytes
SHA-256: 86b55feb30ddd8caade716dc72ae8aa6da9fdcea8d9771697d199a538e118e0f

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