Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc8e2ce519e74f1…

MALICIOUS

PDF

83.3 KB Created: 2021-09-14 12:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3e558fd7edf954ef3282645afa0ddd60 SHA-1: bd7cd337262e17f57bb856a2712303841119d6af SHA-256: 6dc8e2ce519e74f1eac4025c18a6ece51f46874054927ea1c853982680943018
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely involving exploitation or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://krisoc.ru/uplcv?utm_term=neutrino%2B+hack+mod+apk+download PDF link annotation
    • http://condosworld.com/abisol1/userfiles/files/28257606908.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/novosileneto.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/datilolijuwubuzuluw.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fea1fe0e11---51655714135.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb7889be3f---redarobisis.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/dodiz.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/53004942712.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ed61f7d3472ca83076e5e4c60bf2c20/33441449570.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f214d22455---90923579923.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/48182115886.pdfIn PDF document text
    • http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/nezudujevefugeronitobew.pdfIn PDF document text
    • http://aeon-dev.com/uploads/files/202109042311064576.pdfIn PDF document text
    • https://myagenda.myagenda.cz/pictures/editor/files/70015304879.pdfIn PDF document text
    • https://dehayemek.net/upload/ckfinder/files/siretuxiwomiviloza.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/misovejatamegonaf.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/14768783706.pdfIn PDF document text
    • https://jv-cms.crazy-jessie.nl/uploads/files/dafulawegomakufawo.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/25487956759.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/8d75a95f655193bae61cee82b3292818/zixetadoxakubokenogidive.pdfIn PDF document text
    • https://nbc.com.vn/ckfinder/userfiles/files/80963694180.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/timubefawon.pdfIn PDF document text
    • http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/sutisazevarufatez.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/12524599987.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/mifamoredotiwexefoxim.pdfIn PDF document text
    • https://digireg.es/upload/76868191186.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_off0000de2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF643 10864 bytes
SHA-256: a032a8600fa2736058d8121eea4d49d7a9ededf1513be4aabc199f8674cc1c2b
font_02_sfnt_off00010f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F33 18380 bytes
SHA-256: 021ef7943471dc00714db989affb094bfaa1c7529a0aafa7adf61df1e3cdd092

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