Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed0a6dcf62f1943…

MALICIOUS

PDF

94.2 KB Created: 2021-06-28 18:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 78b08926f32e242d7130ea4f5cb3e447 SHA-1: b3f083240661e473c77527757e1f8f61af08e1df SHA-256: 0ed0a6dcf62f1943fda02f8ee1438d9ae7f29522d8b79414b18520adad353b80
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the link farm itself is the primary attack vector.

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://karapinarinsaat.net/userfiles/upload/file/sagufurize.pdf In PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/6cedc0b49fb242d84d519aac9acde4f9/12248448445.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210628224744.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079b94d4f5b6---nowapopifokizigumiro.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210616_38D4BB4306CBE368.pdfIn PDF document text
    • https://susta.vn/userfiles/file/bavotududowofiso.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/83929541822.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072caf9d2e3c---45485591650.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/ad55e1405dd881ab3fa538fa48132fe8/sajizonoposesoxewewo.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/a650e1f1e01d031ac534ee30997c0d94/wosasavagepanomabu.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609988cd70a14---88225670846.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/3ca2cda1e8c2570a21a0e47261472ba0/52453869545.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/27303665068.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/gigemipuwega.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/99441766428.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/witizewo.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/pubiwadejotaz.pdfIn PDF document text
    • http://tfforming.ru/d/files/libodekerarututix.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/tp3jfu9gkqj3c2thvhl0vvab7p/lezijuxa.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/2dced745530235bee972541926124d54/17014583105.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/nnddud7s8tm39qo3r3llj5jmf1/48273654295.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/35168288290.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160964c0b14712---dusit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=bored+with+my+lifePDF 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_off00010fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDF 17096 bytes
SHA-256: 73bc2e32556dbe2b06be2621e94c290b7d8d33e3a31368c8744134eeeb8d1790
font_01_sfnt_off00013c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001546e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1546E 10436 bytes
SHA-256: d0aaa6f25118fd375dde6da828b2f8bd54ef9b82407a56fe98246cc74635bf8c

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