Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86c947e955dc8dd…

MALICIOUS

PDF

71.1 KB Created: 2021-09-18 10:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: cd30e68cc4c3873dc34a3fcf2ed2c946 SHA-1: 93ad24e8804c7d09e8e90a61e8975d541e102e01 SHA-256: f86c947e955dc8dd28c19ad8f0250b3148a957c95662807e4570dd41a960e846
176 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one pointing to a raw IP address, indicating a phishing or redirection attempt. Heuristics suggest it's a link farm on compromised CMS uploads and disposable hosting, likely serving as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://hgqq.hk/tony/churchofgod/ckfinder/userfiles/files/95518148573.pdf In PDF document text
    • https://rintrans.com/files/metutefet.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/nirozajagapenunoxej.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613311e01f027---13586982023.pdfIn PDF document text
    • http://woodwaysindia.com/uploads/wudanipuriwepalamobus.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/52196164309.pdfIn PDF document text
    • http://b40555.handyfriendship.com/upload/files/monoponexixepojebese.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/8299776874.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9f42be0dd---magadizivazegufiwepapam.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/silopegexiv.pdfIn PDF document text
    • http://allivecoat.com/userData/board/file/61129278975.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/bonivi.pdfIn PDF document text
    • http://www.rsvpcatering-ar.com/files/imagesfile/banefevosazujawutasajenor.pdfIn PDF document text
    • http://cold.lt/userfiles/file/zutegurefopag.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/gigowagovetibozafubotula.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3e4aabecc---nuxujipe.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/93001600031.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/walurugekupunisasi.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/75867159440.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7750999da---82586133859.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/jirofanofobijebuzal.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/nawekibutedemufikosike.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/58d934eadd109682583822967698a6d2/vebepowumagaxuz.pdfIn PDF document text
    • http://studiostocchi.eu/userfiles/files/30391044823.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/gewuwo.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/63qphpr50h1urs7lheavpnsqgu/58498116116.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/43386094001.pdfPDF link annotation
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=friv+temple+run+3PDF 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_off0000b7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7F5 15648 bytes
SHA-256: ed53350057b985bfc4e0d9538b8d91df648afcba832092a9c16dcf53315a9f19
font_01_sfnt_off0000e00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00B 10280 bytes
SHA-256: d75a1c88c198e3fd3251ac42abf591b4acc74776ef862fc8b14fc0810d27eff2
font_02_sfnt_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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