Malicious PDF — malware analysis report

Static analysis result for SHA-256 2881a8e4fba57780…

MALICIOUS

PDF

75.8 KB Created: 2021-09-03 08:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cb1956e5bb1b6a2a23598711f1eac71d SHA-1: a8e45acf78dd8f69660c1cc9b584436e32eae249 SHA-256: 2881a8e4fba57780db2c2f56d19a09c1dd09b884519680e8e970f883fc31b589
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous external links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious or phishing websites, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://laborke.ru/uplcv?utm_term=mrs+piggle+wiggle%27s+farm+pdf PDF link annotation
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/89dsrm6jrn62kp3vkgq6lri5uj/finelarulegif.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd02035e1f---10232805419.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/3b1882305f2e975a974a2ec01388ac88/26999109076.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607a509f8dbb0---fisadiji.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/77183223712.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/42407245504.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/475c592fe648fa5a503ff09f31487078/pefukiliku.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080262f1e0b7---gemunowofadirekupo.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606f28961fff7---palipevuwelozorizinu.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff84321481---25954142156.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2ee338010---gigudebajuwitagozi.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2493941e8---39224723284.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/xujozabiza.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.org/upload/files/44126887856.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/jagepebawarelopuduw.pdfIn PDF document text
    • http://allasclub.com/campannas/file/vimolakidakixot.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/21565526880.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/f377444fbacee30b69d6176e1a3b4b0b/67751951209.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/kixatowokuvaj.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d6ad464f2---galavikawu.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095cdccb5e31---pibuzoxuwovetifexoli.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/lm48o09d37ocak6ad3hh7hml9u/dupenitejuxoberalifuzazes.pdfIn PDF document text
    • http://faulkfamilync.com/clients/c/cc/ccb94402b1eed20a0583117be0c0b506/File/fesagijogesunimolon.pdfIn PDF document text
    • 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_off0000c62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3E 16632 bytes
SHA-256: 7739756c9dc59c9bb15dd42eaf29c5b461dfb526c285df30361a82bec25b02fb
font_02_sfnt_off0001094d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094D 10632 bytes
SHA-256: 8c0af32aed0686516c86724a0acf69d383efcb0710c48b4383c583cfb21e4e3b

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