Malicious PDF — malware analysis report

Static analysis result for SHA-256 1184e833e5a66262…

MALICIOUS

PDF

78.9 KB Created: 2021-09-05 16:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0dc872f5c52887565cdb8c8b9ee0c1c2 SHA-1: 83a674e235b8ac81a0d962d8dc8bb0ba2b037153 SHA-256: 1184e833e5a6626283fc7058e3e9f148fd99b2454bd051847eeaece16507cb97
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm designed to direct users to potentially malicious content. ClamAV detection and ML classification further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5305

Heuristics 5

  • 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
  • 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://medvor.ru/uplcv?utm_term=curso+de+energia+solar+fotovoltaica+em+pdf PDF link annotation
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/17205345593.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/zokuxepovoborajemena.pdfIn PDF document text
    • http://kubkao-kubpla.com/userfiles/files/tapejutilogosowugevozanu.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/woleme.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/zanurapeveb.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/sokawemumubafi.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/rltfm0gm509n304gf3clc70eou/sibuxajatawuwavidopigub.pdfIn PDF document text
    • https://ecoretras.com/file/57446973195.pdfIn PDF document text
    • http://tangiahoang.com/skinkorea/Images_upload/files/72151946636.pdfIn PDF document text
    • https://listapp.in/ci/userfiles/files/vororun.pdfIn PDF document text
    • https://ovalpolycoats.com/media/25519311634.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/pafopojesokeze.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/f94a94d9a39446d6063e99e893558551/5750606240.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210825_831635D2F3B1F788.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/65474948440.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/14392990853.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608056d0692be---tivovuj.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/17947550463.pdfIn PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/83091771229.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160837c5dd790c---17713920631.pdfIn PDF document text
    • http://sung1.com/upload/files/74220386548.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/midukexotojodujetep.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/dekoso.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ea1e4f05d---31519050751.pdfIn 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_off0000d824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD824 11160 bytes
SHA-256: 41a8430700a6746dff97c4776d1cc24545f156c5adf071ca386e1061f6a3038d
font_01_sfnt_off0000f216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF216 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A28 21044 bytes
SHA-256: d697c15791f4f1ef0379005c8270939bcadafdab461efa0405cee9cac63378ee

Open this report in the interactive analyzer, or submit your own file for analysis.