Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d8ab2d61781da6…

MALICIOUS

PDF

88.3 KB Created: 2021-09-10 07:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3df5e767bdcf643aaf0e6f98fdf9e9d4 SHA-1: ba689cf4998961b42f6a4b422c9d7958cef150fd SHA-256: a7d8ab2d61781da6422fe5aaa73fafe74d42f12a72517b28544ae1c0b9990250
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document's primary purpose is to host a collection of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=my+hero+academia+season+5+episode+6+english+sub PDF link annotation
    • https://seerupit.dk/assens/file/lidulatijomitazap.pdfIn PDF document text
    • http://salespate.com/userfiles/file/57667499994.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/91633480890.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/linebaguruzinijatopi.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/bexakokaxile.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/11371705781.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/fonaviwerumuvosebaxawod.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/ginokav.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/d0fh8tjgmckfn3hvkkt5ft4jf0/zubazemo.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/tk78lbll01fgl30fbpoo81c8u3/rogegozibaziparajixup.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/xonuvizarevofadi.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/daritenapujisufona.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/88260979153.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/c2hfd2k6ne6tcok4j1plfu1ha0/60400037457.pdfIn PDF document text
    • http://mobiliteit.nu/files/zulozexuv.pdfIn PDF document text
    • https://gencatakan.com/upload/file/17425429161.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/90521511543.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/nawepatisu.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/binivigolepubivigijosax.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/oddmo3ul2e6c6rk1m7idb77tp2/digotulukemutoniwofira.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/66055567774.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/xonosanuvov.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135fd944ad7f---gozutasojokan.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/22177403301.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/fukasuxujaverizuzipi.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/vimukefefu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF83 11512 bytes
SHA-256: 57d7d21ee1378c7b6ed6086cf74f9f2af701e5f2f5800e1c4fd15b1761434b51
font_01_sfnt_off00010a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 18184 bytes
SHA-256: 9bd7e53138494d3cb2863a258e1d66206ef08ec42769364e7c4d3b7c35916fd7
font_02_sfnt_off00013900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13900 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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