Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe660c53ee7e47f…

MALICIOUS

PDF

79.6 KB Created: 2021-09-04 20:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b0ac324cbd1df33927812c94633380c6 SHA-1: b04bf916e85b42c5544f6d7da73243228afd2572 SHA-256: 6fe660c53ee7e47ffe83c1fdc2b728c7dc1c37bb7a44044720109bca19f5f4fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • 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://philabc.ru/uplcv?utm_term=positive+discipline+tools+for+teachers+pdf PDF link annotation
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa72364193c---xodig.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/bekevu.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/nimimoxopiwazozu.pdfIn PDF document text
    • https://upaspor.com/resimler/files/jikibo.pdfIn PDF document text
    • http://polaryachts.com/res/wysiwyg/file/xepegiduvowelifusivowa.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/paxebopupolegixad.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/91373185729.pdfIn PDF document text
    • http://protok.pro/upload/files/pozutidirutadapife.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///50282321720.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e39e5ef0d---8093537358.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0db055638---57740098912.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/97828053880.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607b79dd96226---44375611584.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f511d0ec700---35744728195.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/11446675647.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/lidutodupikakapusowo.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/nifuvir.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f56e49c91---99299970776.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/90f144uu1eq9tuejfaoogvidtv/82853395198.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16087f45e1c701---52795587953.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/wodopitemoteka.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/muzosazetegaxilejazim.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/31319890488.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_off0000d4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D4 16944 bytes
SHA-256: 2d70059aafa0e416554362724de3bc7bd859c28e4cdfae7d0aefa769b0b9705c
font_01_sfnt_off0001000a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000A 10784 bytes
SHA-256: 9c71cde0dd86f41a6540f637ce4880a1e62c69d1fe87ac689a376d39cfd5a74a
font_02_sfnt_off000118d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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