Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26294e9ea9ec719…

MALICIOUS

PDF

89.1 KB Created: 2021-06-28 14:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 97c27a985fd51ab48d46d3c6918a15c3 SHA-1: 9137147f253533686c0849dba45985cf4bc94072 SHA-256: e26294e9ea9ec7192dbee9897fa571ac1189c6d4855b7d2ede9a82d519ec292f
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm, with many distinct hosts and URLs pointing to potentially compromised CMS upload storage. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The primary attack pattern involves directing users to external, potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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://behagi.eus/files/galeria/files/wuworifuxugewofewosex.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d18b0baa0---14421373892.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/035c3f8187545c4f427f493ec80b6933/75852530150.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b9730a72---69074192414.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab687f3a153---nulaxoniwoze.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872a98457b9---sogefazuguzef.pdf
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/mtesj5b6s035e1913oh1urrgic/zolirajudalanukajezo.pdf
    • https://slezanie.eu/userfiles/file/loneresojiw.pdf
    • http://beergolfers.com/blog/images/file/19763408900.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d60cdada0f3---39041254198.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/r1hpm8k6lkjhddj0igars1f9u1/51068773465.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/28ede936cabdba5f7733ad718165cefe/33809391512.pdf
    • https://tenekedjieva.com/uploads/file/bujeniwawobon.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/b48317c73a35078005a46dd00078b6b1/guxixijatizedum.pdf
    • https://zemiigori.com/uploads/file/fezefejenax.pdf
    • http://jevades.com/aircraft/fckimages/file/kebunekufagepemanidemo.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/pcr1sbiqol39cs1jhk89jrgkal/jewosiwiwawonoxirivosodib.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/8103b6ab38f9277a4fa57ee0bcf29ccf/60660554897.pdf
    • http://fouladsazanco.com/Upload/file/30092938739.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d317d1f5f7---ridoredijuzumekimete.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a10p5ecb1hlc2v7ooqb32u9ir5/39519376356.pdf
    • http://funperm.ru/content/file/xedetozimejede.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16085a6afb9487---49909027214.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/482ed985179b94cfcc72aa1c037e23d9/12108274136.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/7h5rso9hndrpbnhbcfh8hbq2k1/80293541329.pdf
    • http://maasmartcity.com/userfiles/file/supumaburivibuz.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/a7dd772e4a823f8898da06ebdd3dac99/35800419147.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=church+of+the+nativity+of+the+blessed+virgin+mary
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC2 16792 bytes
font_01_sfnt_off000104cf.bin
562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104CF 1860 bytes
font_02_sfnt_off00010d81.bin
a91505e8a99886d8c4d183162744a96945435951f1cc2bbd0fa7da2038b47bd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D81 17480 bytes
font_03_sfnt_off00013b84.bin
b1f59e13729e6cd79b8d34d904506616030f07eadbb48b81183b03892322b74b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B84 11376 bytes

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