Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa4daa079863da5…

MALICIOUS

PDF

87.2 KB Created: 2021-07-23 09:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 56daac66ce13ea7371092433d98ab7cc SHA-1: d3644ce68d26f147c8e582d1662e462535173a6b SHA-256: 8aa4daa079863da5fb1ad8c116973ff7d9f75b68c9058c82144506bc234fde9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The primary attack pattern involves luring users to these external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/7lssa3iri58h3s9kcm6lbrp059/90680077404.pdf In PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084da0941be0---xumufo.pdfIn PDF document text
    • http://abnicum.com/files/file/mikixafexudogi.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/i5qn0i6vmt2jd8v166jna6968n/rererugu.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/81488307751.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f5616abccd5---romasenezeluf.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/icf2odnhp44bdrh5t8c4nr264j/83133552930.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/943d06ed0dbe743d4449e4270f5b0be8/nudovaduzu.pdfIn PDF document text
    • https://namlongadc.com/uploads/news/files/juvovazinotatixeronamopev.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c50be4d448---84569409227.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607a21ca18600---dugurete.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/zatepavab.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/5e9d924fc9e3d7ac4f82bd89abcd9348/ziveduxutonefemabimipem.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/pitezinufeju.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/82965776635.pdfIn PDF document text
    • http://poiskvod.ru/images/file/94693858415.pdfIn PDF document text
    • http://sromedical.com/file_media/file_image/file/dabowokab.pdfIn PDF document text
    • http://dges.in/userfiles/file/85765616409.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/af825d014353ebfe24cae38cc646e089/jisufoxinujuzo.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/kifuxelekotigeni.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160917b1777063---juponunepejalobeneg.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/sogukuvewa.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d59d5d0755---movunofunisuwaguwotasu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=uptet+previous+year+paper+2020PDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE653 17832 bytes
SHA-256: 439ce2d41637b77b481470fbb0f611e2d3381dcce835518cc6ddea9ccc483ce4
font_01_sfnt_off0001159c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB3 10624 bytes
SHA-256: 72cce983e78ab2911267200343a6bce943ccf51382bd4d77c1564bc39b7ec66f
font_03_sfnt_off00014641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14641 1780 bytes
SHA-256: ee6d8c25003eb2de61ee1fda640ec7b8e4605923364b71ee832b966c85f0f81c

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