Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a9f68c58956dcc…

MALICIOUS

PDF

86.4 KB Created: 2021-07-27 03:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d084824084736c113733ca9320cf1738 SHA-1: 119b4ce6c9752235c4a8d58326ac7fa8511eb45a SHA-256: 37a9f68c58956dcc0d26ede6d3c8d2f07d48f5bc8b90238dcfaac527a60dce3b
196 Risk Score

Malware Insights

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

The file is a PDF that contains a large number of links, many pointing to compromised WordPress sites. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests it's designed to trick users into downloading an archive, likely by providing a password to decrypt it, which is a common tactic for bypassing gateway security. ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qbu4rbe50q5bil8vq54g1fvhs0/74628187142.pdf In PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/rburm554nml3m9p7uktc5bcjjk/luwibovu.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/ccce5667b55cdaf6cc5d14149a47953f/67200574791.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160888343a7943---samewuvilu.pdfIn PDF document text
    • http://nenorm.com/files/files/rikumulemubenijure.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/94003935342.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/bojufafuzifal.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/37903598174.pdfIn PDF document text
    • https://jetaime-shop.com/files/33428023423.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/vujonizenuj.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/72e1670d37188ae2fedc024311e9b7db/9603099406.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7914c76f5c---dezinexuli.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/522cfe4a8049d3b389b7dbe6953425aa/rimivokukoxe.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/04683eb66c7d7b1c23c123c1abd8f142/kivamenoro.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160738adf28f04---33388429434.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/66148744164.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077ec7d338be---wikogaranosut.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/at10psr3je7gahv8n6ja2u55bo/92564412713.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/798959074.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b6edcc2df6e---23223195719.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/d10d5980d96a7ca872fa601f39c813da/femelosuzuxitoxide.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/wapevonexeximufujip.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3eae1f306---83881397965.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bce1b08e73d---56241058186.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ba04a9f1b---kokuwenu.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/6222889967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=animal+jam+play+wild+usernames+and+passwords+with+rares+2020PDF 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_off0000e854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE854 11312 bytes
SHA-256: 9fd36afae2f2d26dac13315bbf30a3da265969b10461c86e1175924f27f3cdd8
font_01_sfnt_off000102c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C1 17928 bytes
SHA-256: fd2cb1794be42ea17bd1e2621c0c40efdbfc3ec5aaac60d34ef5272bb6de61a5
font_02_sfnt_off0001320d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1320D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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