Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1de7335688915a…

MALICIOUS

PDF

85.0 KB Created: 2021-07-31 04:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7c5d2ac920bfe7c89e9515c6a8ee1d36 SHA-1: 37af5155e9b83514549d76cf9c432ab198cbcc2b SHA-256: 8e1de7335688915a7f743ac777903f8ee01fcdb81994867f0092761546a6dc7c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URI links and compromised CMS upload links suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=bir+yedigenin+i%C3%A7+a%C3%A7%C4%B1lar%C4%B1+toplam%C4%B1+ka%C3%A7t%C4%B1r PDF link annotation
    • http://shinies.ru/img/lib/file/kasaxetomon.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/55243078100.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/34105812496.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bad769a82e0---rufegagaminufexejipulovu.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/5d6b60ab44cbf5a4f93ba3d789ea53ca/33929545774.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/48012004990.pdfIn PDF document text
    • https://nguoixunghekiev.vn/userfiles/file/54944855956.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/lowoxebe.pdfIn PDF document text
    • http://xtra360.net/campannas/file/vatozewugutesedipepokumi.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/d6ca87e4263932a0e568c89888b6c47b/64648494724.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/16434145488.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/55664654780.pdfIn PDF document text
    • https://mimpiindah168.com/contents//files/51564996034.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/envsf9miooq8ms58d1k8m8v0pm/samok.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/4457a830731d93282beabb311475f017/61344724086.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/352b1fce6c49f17a57713d512b14f2b1/topolisujoxogezo.pdfIn PDF document text
    • http://steinemann-ag.ru/setugilozelunakifiki.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ede9f855c45---21033478991.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/18466477982.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160df39a01f5cd---vinibeponuj.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/33008226264.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082acad24818---27271969076.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_off0000dff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF4 19828 bytes
SHA-256: 81ee4a51094c1f50de1b9b82d501ace213ba5b5ed7331b9cb0a1255fe73f904d
font_01_sfnt_off00011189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11189 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A0 11068 bytes
SHA-256: 0ea6cb89c3feced78a46347f6907b5a9c947261244187040511f319a080208e0

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