Malicious PDF — malware analysis report

Static analysis result for SHA-256 baefe6cfde5357bc…

MALICIOUS

PDF

92.2 KB Created: 2021-06-28 15:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 94733b23f984ca41da36ec91c80331e3 SHA-1: 1ed0b5d4154fe97d2efb78cb48a98c9620ad9b91 SHA-256: baefe6cfde5357bcba33e8d7641d438aaa1929d4a855f3e0d6a6ea552435538f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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=the+relationship+between+genes+and+chromosomes PDF link annotation
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/183bc57626b76a927479ecc8b4f57739/nozebenubeg.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/86857954137.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/nipomazizogadeputoreru.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d7b260140---66193868517.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/qm87mk4rigu7fsokm7vnce2e07/wapekipezalowalasuvugiwok.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b96ace67f4---mamivupukawisuniru.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796e58d31de---48696851581.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160c9460079bd7---zapoxexisewixebevivip.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/0u505gqonjorja1gtc6k0fdj8k/xumojazisapatifaxi.pdfIn PDF document text
    • http://myxroad.com/upload/userfiles/file///12517972777.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/92954266231.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1a78e128e---57288287615.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/larolosepeputuv.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/7reh0rb4fbumndhgak5rdjce2s/30874974482.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/tesabiwaxexefamilaf.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/61709468418.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/cf1508f47189bd26de8c80badddfb5a2/bikavunaseluresifo.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021060902363473499.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/kuditefazedowelobikukiz.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/12828586544.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/44c4bd89f047634d767caf90e76351cc/36804313817.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160850dd97593f---73353766830.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/fc11e015aa4a44e43d4e62f69840b48b/xabefunepafuja.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/a7831f5ed2ce3dfb7ca5d8cd98ea7890/serotutori.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/begosatovap.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10556 16092 bytes
SHA-256: 98bcec2be85b547d266a48c61dccc50816b624367bf69e2f194f2b8087d010f5
font_02_sfnt_off00011a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A98 11152 bytes
SHA-256: f919568f808c4d09b9b041f922ff9621c456a7d24ad7b65c213b77de01d3526b
font_03_sfnt_off00013416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13416 17648 bytes
SHA-256: 2a01ceaa4586164ea1b6ef9fbd8edbc54b86624e1ee581ca89e34d85602afd03

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