Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eadfb706e8447ef…

MALICIOUS

PDF

87.0 KB Created: 2021-09-04 03:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 45138bcd58c2293e6b8a083f6da30413 SHA-1: 85b0878efd3d4d551420d7c27e05981d779619dd SHA-256: 2eadfb706e8447ef8da7e2e6611de6b1497b8ed053204dc004cf0d429862d776
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The presence of numerous links, including one pointing to a compromised WordPress upload, suggests an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://anfauglir.com/images/file/55070707253.pdf In PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/35319041377.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210621_EA3650098ACC5230.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/db085484137655c5f3336fbdf4a81c12/56880321474.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9b3b40bf9---3246291299.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/c75a2ce6c66e6af4bed70a8d89b7caa3/luxafozudex.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/befe97aa47a485cea464c67c90760c3e/xigudedagagizusizemavuw.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/93101437595.pdfIn PDF document text
    • http://aurangabadptti.com/ckeditor/ckfinder/userfiles/files/81299994386.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078c22f1718e---57907910100.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/tijuxibewoxob.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/bolivun.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/40623427694.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/ribasemofobeze.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/58140238062.pdfIn PDF document text
    • http://vtaky.sk/media/file/46316554711.pdfIn PDF document text
    • http://livestocktool.com/d/files/41370732246.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/92234200575.pdfIn PDF document text
    • http://skisun.it/userfiles/files/darokutivijukitifig.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/d46ee0a2c7bc26da3a7a952f21634d63/91251426702.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/78383930374.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/jonefep.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/82396775957.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/764fe1322b6e7b223e729dd21cca3d68/72788754897.pdfIn PDF document text
    • http://safarekhoob.ir/basefile/safarekhoobir/files/vusinulareza.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/butanujugumedegigadavip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=strict+muscle+up+program+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_off0000edf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF0 17952 bytes
SHA-256: 6e02d0cd103e12edb172a4a60a507f4e89348f6fa585c6a078bd6159154478d3
font_01_sfnt_off00011c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C96 11036 bytes
SHA-256: 70c30d7a4fe2f154ec0545db174bbae71e545114094cf6eccd87c08dcca91f2a
font_02_sfnt_off00013613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13613 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1