Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe27a657bb655f5…

MALICIOUS

PDF

68.6 KB Created: 2021-10-01 14:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: fae48aa5400af57ce26a2638eccf56dc SHA-1: f46ae7cd84b8226e0dd5974f08e5d7ad4972086d SHA-256: bbe27a657bb655f5965d892eca28102837f6e44437e309d4da3f2336d3c26f28
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://gyn-ordi.at/myPix/file/tekabemigutejoki.pdf In PDF document text
    • https://crmsaas.dswip.com/ci/userfiles/files/38787512923.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/zevunax.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161569ae686142---vepadopug.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/9766864690.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155dc0158d23---befizufawe.pdfIn PDF document text
    • http://rsst77.ru/upload/files/wukitazol.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/kuruzoxefaxepedewoxaboma.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/19150074297.pdfIn PDF document text
    • http://isotope3.pm-ural.com/uploads/files/xutuxujezamerofegin.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/41355651889.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/xikoviz.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/wajutiroditujurarib.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/79582759136.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613671ebe00f2---93697029636.pdfIn PDF document text
    • http://020tzs.com/baige/images/userfiles/file/lurep.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/22368840377.pdfIn PDF document text
    • http://vip-cond.ru/userfiles/file/12698908897.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/49997484937.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/83861032881.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/60109017104.pdfIn PDF document text
    • http://www.bandungmesin.com/file/23349781341.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=midnight+fm+full+movie+watch+onlinePDF 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_off0000ae99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE99 10900 bytes
SHA-256: 126c46e3dbd693e1a75e1d629722a3db7e00666dddb4e3c3b5f2752640c6dd8c
font_01_sfnt_off0000c774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC774 14856 bytes
SHA-256: 5e47a60d1aa755c2fc130532fe159758799fc85c3f42280c673d4738f51f8806
font_02_sfnt_off0000ecd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1