Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ba6b4f17239eea…

MALICIOUS

PDF

85.6 KB Created: 2021-09-17 08:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b07c94f049a76c68ac7733b114a8c80c SHA-1: 2456b2fd03e81bb04f84d20fb408a7d9d3a232cf SHA-256: 09ba6b4f17239eea7a074c329441ed6239ea31cf5f319f7c0c3b66df37a48cf7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pixomot.ru/uplcv?utm_term=transferer+une+application+android+sur+carte+sd PDF link annotation
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/d4551c733061dc24cb1c181e3ef4f5bd/bizejowukipetagarus.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16141390a7ca91---jelokajapezawojaxuda.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/6c868627f7ce2c1057e01136f347302f/51838639412.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/867259317cbcb495daf0626ed73cea20/96091861957.pdfIn PDF document text
    • https://evabizz.com/userfiles/file/75814075183.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/16759981058.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/34640552614.pdfIn PDF document text
    • https://securitydm.net/slicice/file/84291654428.pdfIn PDF document text
    • http://sms-dk.com/FileData/ckfinder/files/20210907_6A668E32606202AE.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/7849330349.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/37778547388.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/67655882240.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109071836526443.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/ab6fbc9b94400ab3d4ae02f6daee6473/delinoxun.pdfIn PDF document text
    • http://vkts.se/userfiles/file/16319782804.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/27967048491.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/a241b05e9717b378cca6a48b988a4b1e/38511135319.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210914_67454B1CB72161A6.pdfIn PDF document text
    • http://kozelsk-adm.ru/files/uploads/files/54739020454.pdfIn PDF document text
    • https://curtain.jinware.com/upload/files/zawegijojavamurino.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/xewivakolabemowulilevi.pdfIn PDF document text
    • https://beldapromosyon.com/calisma2/files/uploads/dukimifekem.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_off0000e76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7E 19316 bytes
SHA-256: f99dfa63295a71a0b6dc8959adf1c206e20021dcd52ba0c379737fb047d5aba0
font_02_sfnt_off00012fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE2 10676 bytes
SHA-256: 7bfb3a2b4667d250e6aadce46480df1169ebdf0076e7e9311af1308c78a74725

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