Malicious PDF — malware analysis report

Static analysis result for SHA-256 0464eaca46063875…

MALICIOUS

PDF

87.1 KB Created: 2021-07-01 09:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae1b810158908bd54e613a88dae97aaf SHA-1: e955ed5299e6ac1f35ef53d1c3a7c1ad2d5a996c SHA-256: 0464eaca46063875acbe33a7d64f493bfb263af37f981fe9ac5fdd3fd9716cee
156 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it as malicious. Heuristics indicate it functions as a link farm, pointing to numerous external PDF files hosted on potentially compromised or disposable domains. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

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 http://marthomaiticherukole.com/userfiles/file/44378119578.pdf
    • http://okwmd.com/upload/fckeditor/file/taxulonokemenafatejatu.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/9a89f6fadb5b94da76b9b0e25e6023e2/21340730252.pdf
    • https://anukulagrotech.com/userfiles/file/kegaziti.pdf
    • https://kamarkosong.com/contents//files/raposafagekefulunujus.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c6371ae354f---mofisazowumegifa.pdf
    • https://nestaerospace.com/uploads/file/xenegawovudosesex.pdf
    • https://nutstudio.it/userfiles/file/gutebetatusisotapebup.pdf
    • http://matsonconstruction.net/userfiles/file/91973653468.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c680b91b85f---57085517654.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2162341f6---20996517401.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff0c655850---visosupavafuvedenisa.pdf
    • http://clair-environnement.eu/catalogue_dynamique/file/zifonesonizaninupipofuxa.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ac66ef23d---jifopilopinuxewefomologa.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074badc506a5---tivumoxoviw.pdf
    • http://delvalle68.com/clients/54584/File/87625962231.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cad2c6244d---94914044070.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3d9f95338---xonaniripebex.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/a0sk5adme58skbcuqnkdjn2hh0/defuda.pdf
    • http://archerelectricsupply.com/userfiles/file/titulenapulomexiwo.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b812cf983fc---45158599423.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072a54b8c868---kakemep.pdf
    • http://ajivikafinance.com/userfiles/file/12787944471.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607201c085d05---46956119071.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/1089dd7b01d893f5acd1ff9aec65ff66/pevitawebegawubip.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/1f7abd4de3282eef31191248df630a05/rijubefimelopagu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=san+marco+florence+fra+angelico
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f019.bin
f6c9733edcc294b0316fed1956a1fc9da7b9cff3d7bf22830723a9bbcf436141
pdf-font-stream PDF embedded font (sfnt) at offset 0xF019 18440 bytes
font_01_sfnt_off00011daa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAA 16792 bytes
font_02_sfnt_off000135c1.bin
a5b3b8af082885e20a4866a94f230a4d15aab724a031fa765c5dd66b508d1905
pdf-font-stream PDF embedded font (sfnt) at offset 0x135C1 10488 bytes