Malicious PDF — malware analysis report

Static analysis result for SHA-256 2064480e9d2e9d7e…

MALICIOUS

PDF

87.6 KB Created: 2021-06-28 19:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff36484f4bb57640440e855c983fe11c SHA-1: 76899328d65e2aea8d5ba89194f17ec9dc16f9b5 SHA-256: 2064480e9d2e9d7e211857b3d9a5d1167215b201864f4af1e8435f3d18af1cdb
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to distribute malicious content or phish users. The presence of multiple external URIs and compromised CMS upload links strongly suggests a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://crewmak.ru/uplcv?utm_term=taylor+swift+new+song
    • http://1night2daytour.com/ckupload/files/10660396702.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/0870598cc4a8dc26b0c83f7de8a4ae18/44313145970.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/139f9c9db416e0ff0fed545337d19ba9/letan.pdf
    • http://bularz-auto.pl/images/userfiles/file/povikubolagadora.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2760f04ea0---bokubojegokexi.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/29250344904.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f3b7c0d0f---dipupiwaluvilumakabutufo.pdf
    • http://seabeachthailand.com/UserFiles/file/78570759866.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/6d538aa6a653da7f5455c401bd487e9d/3173937344.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607a45b750967---13719432594.pdf
    • http://cukiernia-waltar.pl/qcms/userfiles/file/20287062196.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/410c6e8cea7371b4673f91313e26abc9/17338345407.pdf
    • http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/65855519550.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/7a9a094d8b6dfc750b739dca12525703/89034641760.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/uvmrs5kl9uc96a1tpb2mke90nf/29791343053.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c026173e8---2992941793.pdf
    • http://mobilesamara.com/img/files/file/54458009231.pdf
    • http://alarcon-v.com/editor_upload_image/file/46677382019.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4d5386695---gijalinufebus.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d89c1f9a9---gilofemijuxida.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2eb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EB 16792 bytes
font_01_sfnt_off00010b02.bin
2e0fc6215d0844ec3b5733b3f5e38ffe7454b337453a83d6225143cfde30470a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B02 10552 bytes
font_02_sfnt_off00012350.bin
1138acda2b26a7988704d1eff7304ea2463ca335cb29d735a0c10e3c14349ea1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12350 17788 bytes