Malicious PDF — malware analysis report

Static analysis result for SHA-256 042601259e696fd4…

MALICIOUS

PDF

94.2 KB Created: 2021-07-22 20:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 986fc4ab69e772e5f346e1354ed0b41b SHA-1: 89c4515e892651bf19bc306733f7d5f163dc3ff7 SHA-256: 042601259e696fd4bba6b29f80bfc331e701a666a96cca7aad1dce5790f7ec7e
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress sites hosting other PDF files. This behavior is indicative of a link farm designed to redirect users to malicious content, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160baf082de547---78319413748.pdf In PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56bca9798b---xasakerevuwes.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d3f5da0b4---99226191046.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/bawoj.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b844025b4f---jipotusuzija.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/petop.pdfIn PDF document text
    • http://mosjob.ru/images/file/movigozubagukev.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160ca309eb15e3---17127535684.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/26495031619.pdfIn PDF document text
    • http://aa-nusd.jp/89553092279.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/11e11fe643c13b6d28b5ca09621d5b3c/davutegezuwojorajaveto.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acd4ccbd5f1---58915653970.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/23797848687.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/11468420635.pdfIn PDF document text
    • https://deepex.hu/hirek/files/4827708714.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/durorekuvatafefejoror.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc28589626---gugamoxufowafowotako.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaeed09718---nazomuf.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607da22056c11---56376912210.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/65666431939.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f4c48d0a3---23653967114.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/gch6nsrkr3ilblqmuih53gasmq/tifiloga.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/92214380226.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=madea+bad+all+by+myselfPDF link annotation
    • 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_off00010bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFB 17872 bytes
SHA-256: 5ddb72f5c105d3ef47bcac16e326d71aa15f8e895917c088178d632c89f2cb5e
font_01_sfnt_off00013aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000152bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152BF 10248 bytes
SHA-256: 5b9ec2c6a5de8e14e7418f557d46e6595a22e23977e980b948ffbb9d09ba0f73

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