Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9832d0d488fa83…

MALICIOUS

PDF

108.9 KB Created: 2021-07-22 18:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cd1d875e04f897dbbde695de318bee99 SHA-1: b56edf988f83a14530f8c65de6f37a15d768b397 SHA-256: 6a9832d0d488fa83488e33992a230cabb383ffae9b5b12b1f77870656375f78a
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. ClamAV and ML classifiers confirm its malicious nature, likely as a phishing or malware distribution vector. No scripts were extracted, but the structure and URL analysis strongly indicate a phishing or exploit delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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://interface-graphique.com/upload/editor/file/58615356896.pdf In PDF document text
    • http://gojjang.com/uploads/files/58769071516.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/f2f0e5612176770c45ceec66bf5ba130/59061671435.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/53253891485.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aac7b91d6a---2611136918.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/47f098a4d5dc539038c98a7b237e65fe/getazozepusugobuw.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/sugizuzejukibi.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c585ef25e---kujevuwalugumibusajimo.pdfIn PDF document text
    • http://abc-tel.ru/data/File/kidefa.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/vesarawozijagogule.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/lokivale.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16079d3a748e0d---75694270604.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/3847b5668af4db1ad3880d4ae61b7cd7/26190481292.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/guzija.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/8827c84d78c68ceadbe709656285c0f4/37586731592.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/61322460316.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/67402735960.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/a80da4b02804a2e983d47eed1cee22a8/xepobabimijifew.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/22069769835.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160802bd2b50c6---wevejesepi.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/47868675291.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abc1c81127b---rasidup.pdfIn PDF document text
    • http://soupworld.de/upload/file/verujubo.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/33049289599.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a93bc87ff7b---43155784385.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/55955384081.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=live+gold+rate+in+international+market+todayPDF link annotation
    • http://janyska.home.pl/_mjanyska2013/fotki/file/pifaberu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000139e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E5 10652 bytes
SHA-256: bc345084cb8248abb880eeb6679de44b98b0aac0251dfb914b9691ef3f9983cf
font_01_sfnt_off00015205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15205 27220 bytes
SHA-256: aa5398df95e6f19b782b08ec32213432e5c570705affe8693fc554f54ce5be8a
font_02_sfnt_off00018c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1