Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de7e5e1c0295ae1…

MALICIOUS

PDF

74.2 KB Created: 2021-09-06 02:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 98faa74d859a30a30812c25915b6e6d2 SHA-1: 1bc21706583f94d5f786ad79177e2fda09c6de1c SHA-256: 8de7e5e1c0295ae1075f70934b1f649542d784f8d5d6bc9b2f9b2a47a9263cf1
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS upload storage or appear to be part of a link farm on disposable hosting. The primary function seems to be redirecting users to potentially malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://kovofilm.cz/userfiles/file/kolebavifidizekemo.pdf In PDF document text
    • http://shosholoza.de/file/tabagetapup.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609447d921b8a---10294312399.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/gepin.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210901_083602.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/danofuxow.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/d17c9c7afc88f06da312781499960a3d/75502167393.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37e6f22d60---luniveluzuwev.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bff03a98a---xiwunulumiviregukoxot.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85d6b93942---pofuniradaduvulu.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/tabafiwejuvefuxijojalij.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/xumoxux.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/44241737718.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/f4f8612b3a9541de64d59a7567cbaee5/72024815037.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/69813333276.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da29940d8c9---gamido.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/774f3403411bd010eecd6a6cf706b2d1/62118896732.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/3oqo1vredaspijogqqed9gcja1/wufutajagifis.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/rv88o5iel9hkgqn7ekcrc3caiq/50222272633.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d326b4e9b---kugofurigumaxabinuguz.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613331f647c3c---98670674883.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/6349489978.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/jexuzupawubibizosuxalo.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/sonojabasovudidoditive.pdfIn PDF document text
    • http://abwessex.com/uploads/files/58942670794.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=jurnal+geopolitik+dan+geostrategi+pdfPDF 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_off0000bda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA7 17332 bytes
SHA-256: 1f8457a37fa1cf6a7e94fbc24bd48908b508f37075f0e52fce5b1fabf7bd82bd
font_01_sfnt_off0000ea2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10244 10856 bytes
SHA-256: bd63ed75a14677583493be86ddb3ed4c83b044ec34b4f7e35a81e6007ae83353

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