Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05cd916ca696309…

MALICIOUS

PDF

78.7 KB Created: 2021-09-18 12:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 64d1c1f8e8ae52992d43a4ddca3c448d SHA-1: 9bfedfcda4cd51599c07419cee0d9a6a75ab11ea SHA-256: b05cd916ca696309dbfa4dd6f4a1f0d565c8ab3cb53df5aa2d1c6546cbd21e91
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware delivery or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://teenmag.cz/userfiles/file/vosipobebaniwanukoxafe.pdf In PDF document text
    • https://hgb.se/filer/file/pewapemuzijixelorimel.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/t025iornnom86suhp6782hj5i5/jelememofuwoxejara.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/kagirerenoranoduzitawoga.pdfIn PDF document text
    • http://videlec.be/ressource/file/tuninefulitojuxaneg.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/39681980933.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/lububejuzuw.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161421a95bb632---81341900521.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/falipozitipegesu.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/kujunubumiwo.pdfIn PDF document text
    • http://dangkydoanhnghiep.org/hinhanh_fckeditor/file/rigejoduvevofiletalelufu.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/9a744d51425f1c071ae90f904deb0668/36676356271.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/23168533691.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0197ae49960980080bb0584f7558f0a4/kixusubosetina.pdfIn PDF document text
    • https://servingltda.com/userfiles/file/devejakevilefepipofakuni.pdfIn PDF document text
    • https://almuhja.com/ckfinder/userfiles/files/manuxexopof.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/38002467016.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/nirozajagapenunoxej.pdfIn PDF document text
    • https://gencshow.com/upload/ckfinder/files/16320201880.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/fbgg8jci3sa2tkr6tnnv9s9f79/pupaguri.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/2185930340.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/70193908434.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99104855778.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16145a6cf0f26c---14377565397.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/xudigezuteletiruzojalovu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=grand+theft+auto+san+andreas+game+download+ppssppPDF 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_off0000cd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE538 17408 bytes
SHA-256: 569153c3ecc67e2865e2074cb3a7afe1e7eb9444cd739bc653e2bd4d7e94c8e4
font_02_sfnt_off000112b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B7 11076 bytes
SHA-256: 4a526d68ea355aad4ea2f3de1f20a0c82ec12be5f4d38ef8ccc5f063aa309b45