Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6910e69f493a25…

MALICIOUS

PDF

88.9 KB Created: 2021-06-29 00:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d1af25b40e91b4d18e8d47b2e6399c7c SHA-1: c19c3fd41f96954fed1d9777bb2c9c1be0ab9cf4 SHA-256: 7e6910e69f493a257cd26cec1c825ed45db795d7567042ab0215ce771710af15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs that point to compromised WordPress sites and other domains, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of external URI links and the overall structure indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://wastran.ru/uplcv?utm_term=how+to+ripen+cantaloupe+after+it+has+been+cut
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/5d9a7da93d43eef86629ac84ff6aba05/30075196695.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/6d3487eaa8ef4a5a4b5f0d00096b82a5/rodokawolu.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16096984e76324---bimibutigekudowupavivazu.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/401c88ac30374c4a03c7d925793b38be/11482841913.pdf
    • http://dso-fuzine.si/docs/dotejirilolunaruwumoj.pdf
    • http://solamsys.com/userData/board/file/ledumiku.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086baa024842---gededupo.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160adab02732c9---guterobasejuxewufovixuge.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077e78dd0d67---tewitatire.pdf
    • http://gancza.pl/userfiles/file/15163909543.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/a268f70d2745e673462ed981688a53bc/dobewepafes.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c168387858---surazolevawen.pdf
    • http://madang.eu/f_pds/fck/file/59209422396.pdf
    • https://accu-split.com/userfiles/files/vubalafotaba.pdf
    • http://hevolta.com/upload/file/62840713654.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/d16fd030eb622703f51426e75875c674/64373523780.pdf
    • http://phantasos.org/userfiles/file/negadezusarag.pdf
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/naragedurikegujiwiza.pdf
    • http://sgd42.ru/userfiles/file/3056184773.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9d9fc9be8---futexavos.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/slvqevgcq5l12jv5li01u3orit/52940603864.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfd15d5ebe---dibazavijedudujufozuborif.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e8de1ca02---kawidusosajipowila.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_off0000f785.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF785 16792 bytes
font_01_sfnt_off00010f9c.bin
e5ee4942866f5df52b416447c6e57ceef97a84b5e126874baa823e58328eff12
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9C 10892 bytes
font_02_sfnt_off0001288d.bin
14ddeec01e3baa0680899d91cf97960616b8882d044f64bbcde646dc7a35a237
pdf-font-stream PDF embedded font (sfnt) at offset 0x1288D 17552 bytes