Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ec913c044eb4e5…

MALICIOUS

PDF

69.9 KB Created: 2021-09-13 22:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b072008ef5c7d5190fdff2b56591f73a SHA-1: 315e43478d462283271b900a0c8ae71f51b8f63b SHA-256: 64ec913c044eb4e5e83f81e54362485dbbf8b560ed636bcecf3da7bf49fec177
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. These links are designed to trick users into downloading files, likely malware, by impersonating software downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=windows+10+pro+download+full+version PDF link annotation
    • https://www.smartfutureexpo.com/ckfinder/userfiles/files/46147016061.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/21679305356.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/xomubamidexevexefilox.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b901f9db6b---rodukodu.pdfPDF link annotation
    • https://thai-airpark.com/ckfinder/userfiles/files/19283181516.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/5631580691.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb01c86862---85825007815.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/p26rsddl5kccti7sqiv565bv52/gukerow.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/bipig.pdfIn PDF document text
    • https://foundationkuzmanov.com/files/zawogirugovifukapig.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/22060630681.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/38390695136.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/50803616185.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/ca4237fe7dc8cdef717d80e178c84ffc/lozif.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/0d102584822ac3062c4a7349012c0098/xuruzasumuzepajowenimaxaf.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/69867414869.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/lamaworigijukevirug.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/90373606067.pdfIn PDF document text
    • https://ww150003.linebot.net/upfile/files/20210912005343.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/39073464336.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/36999298457.pdfIn PDF document text
    • http://xn--b1agpbmdtf.xn--p1ai/upload/file/nanilurowikex.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/tomekadalebabakususewuwen.pdfIn PDF document text
    • http://indexone.ru/upload/file/60348296849.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_off0000b34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB34B 10812 bytes
SHA-256: e84f769850e5af7f90e56258d76577b05ddc57839ab6cd7a721ea186e15add5f
font_01_sfnt_off0000cc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC60 14748 bytes
SHA-256: c75cdd573ab92f9752de73f82282c43329b774f3685f200ede11f8dfded28b6e
font_02_sfnt_off0000f1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1