Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d29aeffd73b4e98…

MALICIOUS

PDF

79.3 KB Created: 2021-09-04 11:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6846672500f3785cfa88092d1fa4d35a SHA-1: 94d4c5311fd765e91c25ed5ac788c49f40b4dd90 SHA-256: 9d29aeffd73b4e9864ef3170b53cf188febc0f98a8445ebcda9ef32079c0bdb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://krisoc.ru/uplcv?utm_term=english+grammar+verb+tenses+exercises+pdf PDF link annotation
    • http://harissarantis.com/userfiles/files/kerowalozonileduxerowokam.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/50919841956.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608356ac937b8---65039453059.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/zenodixunubuxab.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/pepinalofigijakomiweritu.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/88041467993.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/fewopej.pdfIn PDF document text
    • http://cosmik-kino.ru/sadm_files/85101891624.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/54047473379.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f05a2290ef---zefonizobixovus.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/63960126027.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/2o1inm35a42gukqkgd7lom4sc3/49828896032.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/givan.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/45872206479.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a98513a55---mezolarifa.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160b2dcdb9f5cb---doges.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/a3rftk5cm6ca4pk7pr0gi14p32/66645262115.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/jupigakewukuluz.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/ffd89a996bd8663f3fff5271d43b5141/74344306353.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/80356543005.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/zilaz.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/71808797734.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_off0000d1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D4 17332 bytes
SHA-256: b212c9636ecf1f688e46b2255b663db9407fc41207ca4e4b2db453efd1f3e630
font_01_sfnt_off0000fe00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE00 11236 bytes
SHA-256: e85dcfcb284896ad027d8db5a0443e021d642b85427d2187b26faff137a07be4
font_02_sfnt_off000117b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.