Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eba499ddd2b9547…

MALICIOUS

PDF

74.7 KB Created: 2021-07-03 06:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 603453467103724110b2b39f3518fffd SHA-1: d8b7a2e56abb01136dbf8ca16ce61e4d99f37d43 SHA-256: 1eba499ddd2b9547d0e7931bd2b07675b6291d345bfac1d115f9e4646491c143
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to websites hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and numerous links suggest it functions as a link farm to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://inwebjor.ru/uplcv?utm_term=2m+repeater+map PDF link annotation
    • http://msinziniering.com/userfiles/file/98055363202.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/24037579991.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a932344b78d---sanatiwonixowe.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160abf237617b4---45845217263.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/84918635615.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/93d11004e4ec7ecface221b340103609/71511312748.pdfIn PDF document text
    • https://unosms.us/userfiles/file/2414848451.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160abf4369734d---julofezorajowapovaloto.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/ec71bf4529b955283ec0c63d3d402595/zirofevewuxoxapozisalebez.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a96cac7f4e---82634964650.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/tokugevorunodisose.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc6c0773405---rojudujupowinurevajusur.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/88959293c0476a05cbbdd807f776d9cf/95944732176.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/33d0b828903236911bdaa4f2f92a5640/74304544677.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/lasutotomo.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aae7ab0e933f9429157ce2b77f5abf25/bukozagamo.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9bcbbe1a9---12921145195.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/66274155400.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/b8f1f8321a7930ef3e7713e73b5db4c2/32554700786.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/744911a1db003bcb70c482871cb3c773/gokerulejoz.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f26145ce51---susimamuzijomilozenomexe.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/2896974435.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160821274bd65b---86354142164.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_off0000c39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC39F 9904 bytes
SHA-256: 3614d6a397a9427b563e6c4154b2d18bf90756276c2fdf12922a1a74e6d1d85f
font_01_sfnt_off0000d976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD976 17156 bytes
SHA-256: 77507ecc74b4e34888238b9df6b77e813d5fece70de747ce3ff0b43837823dae
font_02_sfnt_off00010608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10608 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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