Malicious PDF — malware analysis report

Static analysis result for SHA-256 334af0ecde19ed35…

MALICIOUS

PDF

81.8 KB Created: 2021-09-14 12:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ac63bca6a3a0ebdebf532d7ed1f38cc5 SHA-1: e52557d5d90236e04f2b6827edc95628a681422a SHA-256: 334af0ecde19ed35ef57baaa3e70e6ab1d285e22d1a5dcd9164fc4921b15b483
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or redirecting users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/f53527e0b5a8e5d9d33bd05643e579e2/kawexejupametukawopoluvix.pdf In PDF document text
    • http://ergakiland.ru/files/files/71440947243.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/81f417c168c45091c0caf6d6784680b9/98073460105.pdfIn PDF document text
    • https://castel.ro/userfiles/file/gomomaver.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387508e1b8d---20985724564.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/39513381825.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/rorugelube.pdfIn PDF document text
    • http://seamacros.com/upload/file/todolemikare.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/32977845419.pdfIn PDF document text
    • https://davaocarrental.com/images/file/19907957705.pdfIn PDF document text
    • http://ztracenaexistence.cz/files/content/file/raduwepezuwimaxosu.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/26594195483.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/6758718610.pdfIn PDF document text
    • http://scsychem.com/upload/files/21030138442.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/91990221889.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d6d80691e---nogizixomu.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/48aa897b7495dd7d4666c8af5ebd1d71/37667702356.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/dawukuxuxirofipejo.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/wolivadisotugi.pdfIn PDF document text
    • http://gdfsztal.com/uploadfile/files/nakolawuragane.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6693e8261---konodin.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/46807361095.pdfIn PDF document text
    • http://soc-in.com/data/media/files/rasotekano.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/nixibulemajes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=super+factory+tycoonPDF 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_off0000da90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA90 17968 bytes
SHA-256: 434e41af64a220fe971f3c7d215d3aa2c4e8d001037af059a065cb9dad82b5ce
font_01_sfnt_off000109b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B8 10456 bytes
SHA-256: 4c6153e1aac42c9c9278f7fbb732aee1fab4b9c156ade2bac6587366aeb7f5c1
font_02_sfnt_off000121ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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