Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e466b28dcf2c25f…

MALICIOUS

PDF

139.2 KB Created: 2021-07-07 23:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b6c6461fdaf495853874c51aefaf69de SHA-1: 8557ea8458c70aab3430822bfe93cfcb585529a8 SHA-256: 0e466b28dcf2c25f99b31c5abb9675d3b62096613bdf94282e81147521881221
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb1669f18f---63381547661.pdf In PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/fuvekixagifuwan.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92d2bc4d9c---31393828664.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/doguroz.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa6614812d---dotiderusopitilabanak.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/77847fa209c335a7d1c15dff42f131a2/42182231361.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/b9f099d429268536fbd33136e5c9064e/jusawigezusa.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/25322430971.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/1c1resm2ddjbb3oiumfbrdvk8q/femamuk.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/wazenumakelogorogelofew.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/c6dd97164d5831f387720009fc00a12b/wolofolosarexarida.pdfIn PDF document text
    • https://avenue102.com/uploads/file/wonuziziwudoxa.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/a7db320517b04b71322967f14530adbe/18423673023.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/xibimasuga.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717048d3664---78029007341.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210706_052208.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/d0bc5426a72f53dcd59b92b25c653d78/90623891406.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d00b820bd7---rarijunobesugate.pdfIn PDF document text
    • http://www.kilincsweb.hu/fileok/file/lasitupolajujiraxex.pdfIn PDF document text
    • http://rubensova16.cz/files/file/84264638651.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/11387345890.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/jalawuguromolave.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf848832bd---92640908882.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/9319067454.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=laws+that+promote+fair+trade+and+competition+among+businesses+are+known+asPDF 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_off0001bc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001d469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D469 18124 bytes
SHA-256: 8c24355de4a2334faf6e18002c321661bdf231d3e2b5e36b7bb03b4f294108a4
font_02_sfnt_off000203f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x203F8 11396 bytes
SHA-256: d946550363566daa031ca96decc2b4d4870ccfb76fa9fdec038c1cbd008ee4e6