Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e25b5203054bcd…

MALICIOUS

PDF

75.2 KB Created: 2021-07-02 06:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c7fa30ff1f544bc0ff1c7a593cfd1d73 SHA-1: 4245a334210ceb11722b947764b757904e2da0c1 SHA-256: 27e25b5203054bcd4319b6f2f5fec1fdb6a9128e4a5813ad3c4428da00535519
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://drafthe.ru/uplcv?utm_term=doing+first+aid PDF link annotation
    • http://gewald.ru/content/Files/muriviragaj.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ee820c9b4---90873374172.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/58528333652.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ae218c91381---lewesowejifewite.pdfIn PDF document text
    • https://codecs.roimages/file/30519746265.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/n098oufgu39vbr5m9hqmcftsdr/kewavivevu.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/54684060042.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c57958e553e---13152788490.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/depaxokebakidovat.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/wowoxevive.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/42117060902.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160983fc6ee64b---7684978182.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/2fc7119a0aadfb3a09b518f6c55467c1/dibinijoxelulolisamu.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e68606426d---towofolifonubumafota.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f845181b88---89729355668.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084b4000e539---lumirapuxamosilupikovedod.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/ecfbadc6edfba1182003ad3df6b33add/tefutavizozapibefupoxar.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/javunapagurama.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/bba01860558ed58f3a741bc5365df2c7/88688395022.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/el575jc3d6370iidh3s2ak5l9s/rujotelisewumo.pdfIn PDF document text
    • http://rld-carbon.ru/file/xafagimidimebotemiluresor.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/eca3b391829d8c4bbf89679f35225311/42972545970.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa7dd5f6db---bapukixifesopuduzawog.pdfIn PDF document text
    • https://windsbs.biz/files/file/76783761601.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_off0000c5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ddfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFE 16436 bytes
SHA-256: 6761bdd311a3a2cd0fe3735485b88338bf0f4f31f955a4c92018932f9219fa2e
font_02_sfnt_off000108ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108AC 10352 bytes
SHA-256: 33389217438a996790b5cebea1d91724e95efca478471f07603d7fa20fad1775

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