Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c2b8ffe6c35c94…

MALICIOUS

PDF

81.9 KB Created: 2021-09-18 01:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0562796aa32eddadd000f5bf594674b2 SHA-1: fa597a680537bf04a7f4c37306a3ffa70eec079e SHA-256: 29c2b8ffe6c35c944d12ce97fb78a5274f92fb0160acdc893b91c15c57c7442e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to domains that appear to be part of a link farm. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the high number of distinct hosts suggest a malicious intent to distribute or redirect users. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the nature of the URLs and the heuristic firings strongly indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.creativetalentnetwork.com/ckfinder/userfiles/files/71762839963.pdf In PDF document text
    • http://beastyenergy.com/userfiles/file/xikasanudaja.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/93085697449.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec4a4ebce2---95058810004.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/jufola.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/sumigufasofejesidak.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/zepotetijo.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/fivomurapebelinoguna.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/mizazenelixagaragu.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/jisavoxivazekakok.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/gipexafogutekosasebeno.pdfIn PDF document text
    • http://opsir.eu/files/file/69811522905.pdfIn PDF document text
    • http://jgweld18.com/UploadFile/file/20210906064727141.pdfIn PDF document text
    • http://szjg.hu/images/file/vaxalujunaxe.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/49087382931.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/42390070318.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/xelimukawubipugires.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/67437858748.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/pelasokogiminizi.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/revibafiwutafakolo.pdfIn PDF document text
    • https://airflow-skateboards.com/userfiles/files/62185078303.pdfIn PDF document text
    • http://deleeuwputten.nl/site/data/ws/files/32644546656.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/6b0cc732448a73a3119818eb30f8efb4/xixirabajat.pdfIn PDF document text
    • http://www.ddu-hk.cz/ckfinder/userfiles/files/76397535614.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=mastery+greene+pdfPDF 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_off0000db7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7E 18060 bytes
SHA-256: b81491d222d7448ccecb501a6eec378f4b4cd849f71a71fae7d8cfe30cef9a5e
font_01_sfnt_off00010a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A81 10524 bytes
SHA-256: c9dede196db0131b692bc0278475a3f8430a3978eefa195859f711904765628f
font_02_sfnt_off00012272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12272 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1