Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b3f05c00960a5a…

MALICIOUS

PDF

88.7 KB Created: 2021-07-31 17:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 161b191baa31762967fa16a2d4d582ba SHA-1: 2cdf68d9cd2d2152c9c1906382c66caa0315627b SHA-256: b3b3f05c00960a5a6009feb40072a64c9f1c91f7d787dbb30e8b6fb2eb322245
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised websites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95'. The presence of these indicators suggests the PDF is designed to lure users to malicious sites, likely for phishing or to download further malware.

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 https://kompaspt2.com/contents//files/mekiroseritakivuzag.pdf In PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/1t01264cn0896d4o29t55ekfua/90050027822.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/dr3nqa6rg2qf2nva71la6pjbq7l7mdfb/rulonowalazewonomoxadilej.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609866bf14cc9---48867589802.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/a5n5hbngcnbln817q50n44g0sg/lagufawikoke.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/19762075173.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/2311974046.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/4896619905.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14b413b50a---kupidopeveral.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be71f62e1ea---91033661100.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/lunegukenudedelenuk.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/dad9f994e454c5c4ec320999951939d7/vofidorojimumanikitezawe.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/49056697492.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/85373399957.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/2e5ef69168d6f31505d736c591101f1d/taruwogesakunomifevat.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9dc8e05307---sodapomavenalo.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/58008966988.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/f66bmddfd8e66d9jnnbu1p7s3i/dinofanilefugipoji.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/vewaja.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/zosotawedidamepawolipi.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/b4a42d7a985eb33edf0b431e72dc5f24/gugenijedajuwowi.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/60659440556.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1609e48e6079e0---rusafijega.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd3048a632---33676519548.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cox+channel+guide+orange+county+caPDF 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_off0000f4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C1 10828 bytes
SHA-256: 07ef9ac1485461726c24c672ae5fd2e7347ea2957b2f4cae384265ff1cba39f2
font_01_sfnt_off00010d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12596 18068 bytes
SHA-256: 22b50c523c4f2ca5cd52cfa20e964c46a5cae67f5f0344368e99ffbfbe0a9a73

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