Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac6bccdb4d3e9d5…

MALICIOUS

PDF

87.4 KB Created: 2021-08-17 11:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: f30d8da1a2f243cc41d5ebc3903b8513 SHA-1: 6e28694524c08ffac6f1f086a616138a91d63001 SHA-256: eac6bccdb4d3e9d5c37392881b73c5b4eef2b1241bb4080d7a56f097e3c3702c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm hosted on disposable domains. The primary function appears to be directing users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://pistant.ru/uplcv?utm_term=zombs+battle+royale+hacks PDF link annotation
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609bce39be720---7583780417.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210805210532183.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/kosavesaxuvudijikaki.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/naviwutef.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/9d7415efaa65c60e2b2a77dc714a3ec4/9639622291.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/lakegikewewa.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/gomubotixubov.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210618_020456.pdfIn PDF document text
    • http://charivne.info/images/file/lawawebawagijerumoluba.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/68582229028.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f73875da00c---41922025052.pdfIn PDF document text
    • https://ovalpolycoats.com/media/wozubetezasatonujugutor.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/1820635879.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/doponuwotowidaxoxe.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/024f51fdbc307811d7daeafd353631ae/laxibegolijitiniboga.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/502345cad1dc8732b46f29c129a007c1/gepidanuwupadowage.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/235d117119274bab05aefdcbbc4d01a1/87480880110.pdfIn PDF document text
    • https://peterdegendt.be/file/20846888147.pdfIn PDF document text
    • http://nomaquito-travel.com/editor-images/lupuza.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/0b63857f48ee5bb9d940f0914887c93e/kifogimunokepagi.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/tcb6c4kq3p8j9c4n2atekrg8va/zunagipolubeva.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/36954056638.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/fomusefezub.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9586e91b4---fivosagikidabenirikuner.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE735 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13
font_01_sfnt_off0000ef3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3E 10608 bytes
SHA-256: 16261706300d5df0a297116c90d614f2cf263b97c9d87f4a35bb4f062620e22a
font_02_sfnt_off000107a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A6 17100 bytes
SHA-256: 1b7bbedf05c868f282239e1d557937788af90b740fe8ca49bcc17fd26dcb9d4c
font_03_sfnt_off000134bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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