Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb59be90d3db044…

MALICIOUS

PDF

86.0 KB Created: 2021-09-21 02:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2b1395d9cf05b3bba20ef7ed7d532568 SHA-1: fd21f94af8fa23ee1cf0952129737738662d861e SHA-256: ceb59be90d3db044d6442df26b8c056776c0e68a1c947ec2aff5e543304613ec
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to various domains, many of which are hosted on compromised or disposable infrastructure, indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with PDF-based malware delivery or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://medvor.ru/uplcv?utm_term=how+to+use+avatarify+on+android PDF link annotation
    • http://vipacademy.org/userfiles/file/tesesikipawotokufasila.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/21142283498.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/nubesudesar.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/39073440716.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/fce5cb4c1feaf3b3715890fab687d603/wojujaleni.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/34619726890.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/2256166807.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/58677905233.pdfIn PDF document text
    • http://precisao.org/files/files/bamujinimap.pdfIn PDF document text
    • http://akvatoria.by/UserFiles/files/zugipaputirebotun.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/12517716335.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/q9rutfgbq2q38vpcafccbukvk0/78584745824.pdfIn PDF document text
    • https://serviceelectric.ca/userfiles/file/zikudazizuzilulejav.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/mipirezedamu.pdfIn PDF document text
    • https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/kuximelunovixotajitij.pdfIn PDF document text
    • http://natalieshuff.com/uploads/file/43509974368.pdfIn PDF document text
    • https://dalyanestate.com/userfiles/file/midesolawe.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/kulerekevozux.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/jj1f08895i2i9k9btce6kmt3ae/bamizusupidoziwekaf.pdfIn PDF document text
    • https://cuatudongbinhduong.net/uploads/files/26858359738.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/rusepiba.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/738580536.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/41426502483.pdfIn PDF document text
    • http://nwatchonline.info/userfiles/file/novajofavunuretuwumalo.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/32866801052.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_off0000ec60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC60 17484 bytes
SHA-256: 7959e6ee28ab65eff665301ae8d59166dfdc617310b38bf3f656028e11be9982
font_01_sfnt_off0001194b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194B 10656 bytes
SHA-256: 895cb63568630d628da6a93f42946d80ea72cd3e876f4574dc836af0f09ca6a3
font_02_sfnt_off000131e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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