Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f07600d5392fe9…

MALICIOUS

PDF

87.1 KB Created: 2021-06-28 20:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c5b2e9e8f3ded428db9c4d4d8b4fd95 SHA-1: efe97f48bfec49307ce5de590e4abe824a0e0e9f SHA-256: 22f07600d5392fe93b021adba509a8af95c72d1b59c67dc1b2cc7d03c2475b3e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://smidgel.ru/uplcv?utm_term=bach+suite+1+gigue
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/d6b51f02b3667ad5b104de99b8ed6f3b/gisaful.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/f7f28af185f76f86e4c96cc5ab94ac6b/dojuvepikaruxofu.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/vd7ov6ehsrqks7npie2eir3bi5/wijawogulose.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/qug7pap34uc2h3jvit1511b3sv/zubinivub.pdf
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/n0i9tmvja9is7mcfi7ns2fv1pe/taromekijiwilap.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aba653c6130---199138017.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871b0aec9f3---miwutavukuzosares.pdf
    • http://cuatro-pr.org/sites/default/files/file/jesununik.pdf
    • https://perfecthospital.net/FCKeditor/file/xiwevesefabokimexataba.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/8vgj04mrl8mdedkk4h06v93esv/sefiwojatovibexelije.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/a40c30e7cd5873fc42bf438b8d16fa08/japujilo.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a7e78ee05---dujebesodifobegi.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c92ad3cdb---ziremifegusoxobufapovedu.pdf
    • http://orikon.net/Images_upload/files/bolejugabejisoni.pdf
    • http://rajskiewakacje.pl/userfiles/file/43559991179.pdf
    • http://jcon-aps.dk/userfiles/file/24749851659.pdf
    • http://apvn.info/userfiles/file/41015503982.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be0852ac241---sozudofut.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160ab64b60cc4a---76208357378.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/f2boirbkhg3occ4q6q29ojiop5/piperopez.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f257bbb2c---zadesura.pdf
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/52588725440.pdf
    • http://ducthoaudio.com/upload/files/bajajuneberiv.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba431d2468f---37490935374.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/2i1245pil4rr31kko0i33cssvf/9088806744.pdf
    • 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_off0000f2ef.bin
603eb86642e2fb50e76c278df5e98423fe02f746daa90127287d46be53dfd04e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EF 10344 bytes
font_01_sfnt_off00010a8e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8E 16792 bytes
font_02_sfnt_off000122a0.bin
06ee58d8566fa82963a027da2c623357ce491cfc3c15d0c9b097e621b5a82cb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122A0 17064 bytes

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