Malicious PDF — malware analysis report

Static analysis result for SHA-256 da1c774999105754…

MALICIOUS

PDF

69.4 KB Created: 2021-10-02 15:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 277dd575c6a38d17fd14a40ee4c3cadf SHA-1: 5aba974828ca35334342e48358affdcd3b265607 SHA-256: da1c774999105754cff502441a17b7b68fd021482192097ff74196f2af8d1823
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or are part of link farms designed to obscure the final destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery through these links. The document body is unreadable binary data, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=interior+building+systems PDF link annotation
    • http://przyrodnik-kujawy.eu/userfiles/file/xobafu.pdfIn PDF document text
    • http://khlongtoei-nfe.com/library/userfiles/file/48705306102.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614be72995c81---lafojanoji.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16156fe456796b---wupurojeto.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/gamexesobitaravawelaze.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/zibaju.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1010b1dfb---finozifulilofikabewizi.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/76798050437.pdfIn PDF document text
    • http://riverhouse.at/pcms/content/file/pewilesir.pdfIn PDF document text
    • http://mocphatreal.com/assets/images/ckfinder/files/dezotabumepe.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/13407150439.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/waxakubakofosumezeja.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131ff061028e---27804127447.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370daf75b70---febexibokuvu.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1631634122.pdfIn PDF document text
    • http://akvarium-olbrecht.cz/upload/file/wexinuzoguwowuroxug.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/92403610229.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210927_82006B0385A23A51.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210912080746.pdfIn PDF document text
    • https://termofriz.rs/files/22370706051.pdfIn PDF document text
    • http://lnv-cnc.com/userfiles/file/posov.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/zefoge.pdfIn PDF document text
    • http://attilacenter.org/userfiles/file/11816660689.pdfIn PDF document text
    • http://naim.naparts.com/images/fck/file/gijexos.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_off0000afe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE3 15516 bytes
SHA-256: ce1e0fc52f96a2be04b7340f6c614672d1b47af2fb9c2ce3b6a77aecca8aa52c
font_01_sfnt_off0000d7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000efe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 10732 bytes
SHA-256: 04865b1a4b4fd510c3accb02c334b8e89e52fa4c8fbd3a28740649f8175f576c

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