Malicious PDF — malware analysis report

Static analysis result for SHA-256 e207768ece399a82…

MALICIOUS

PDF

89.5 KB Created: 2021-07-19 20:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 435f167e419356d80c205d956776c2b9 SHA-1: 4e3029e1b267fe08ce7389aee3b4562fe568813b SHA-256: e207768ece399a82bb179b3e324c35c838ddd06dbdc1b49bfe599e469fcfa10b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to potentially compromised websites, suggesting an attempt to lure users to malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates a common tactic to bypass gateway scanning by instructing users to decrypt an archive, further supporting a phishing or malware distribution motive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://grupposcorcia.it/userfiles/files/vepakatudarubepetiromuti.pdf In PDF document text
    • http://autosklo.sk/pictures/file/botukaterol.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/mobuwofozerupiwikugafok.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085567cad797---segijejababodefu.pdfIn PDF document text
    • https://service-panev.com/userfiles/42342192671.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a309822932f---rufagiginevonu.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/taduzuxoxazifitufemu.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/rudavexe.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/17639689434.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/ripufiridaf.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/xuverexebazutivuri.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/18726844309.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7d0775d76777815a82cc288f231cd33e/luzedikidedikasubixaxifiz.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b269448e879---batabixevutodatoj.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee2823f517---sobudijosapezutunisetu.pdfIn PDF document text
    • https://pendekaremas.com/contents//files/pewoze.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/19448142533.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/3867116373.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/79364347321.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b148b4853---70686403224.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/42655224789.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/7lfteh29ml8gtnn8m58d96afjg/45413816870.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/86msvch3mcanrt3smb1vnj744v/timanudujajeloma.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160cee43152b4e---61370028485.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/879e08770909ac3987ed1a32f5032509/84473516188.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/6bc3888c8cf36e642b0a825840e98d47/5711559477.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=convert+pdf+to+specific+sizePDF 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_off0000f930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF930 10564 bytes
SHA-256: 518bbc9fa0a7e62702439c32a9574457895da2efd6ca97dbfd14d7d559d50524
font_01_sfnt_off00011180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11180 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12992 17744 bytes
SHA-256: 765b23ae7d581e4eecf5ab0775749b86a0e8a24b50678bc6185e3efbf5ffd441

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