Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9c5d9e16d1407d…

MALICIOUS

PDF

84.7 KB Created: 2021-07-12 22:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bf388e7a7df15286bf47b61771e5b765 SHA-1: 3abf1d0d1ce72212e1ce8b1ea44d34cd77d8d375 SHA-256: 0e9c5d9e16d1407d331294c2b4f207aff005a48d6c24980845911f4463dac655
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the extensive use of external URLs implies the document's primary function is to drive traffic to these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://smidgel.ru/uplcv?utm_term=what+is+privatization+in+economics
    • https://nbtele.com/en/cache/fck_files/file/sidamorozulixubed.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e53ba43cc00---8916443850.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160959e93f0022---71259832461.pdf
    • http://bhavalaya.org/ckfinder/userfiles/files/zomegi.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/734160ed32d83041452cdcc7f700a3bc/digibufudedexezanenajoji.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d56f85cad4f---58108105556.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af7ebe798af---15623984797.pdf
    • http://greece-ex.com/images/blog//file/dudevefunegavomidubixakev.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b071690ea---setomafurasubuzulomari.pdf
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/maxajapejarun.pdf
    • http://studiolorenzino.eu/userfiles/files/betemodogokirolirazu.pdf
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/luzawe.pdf
    • https://zoldlepes.hu/userfiles/file/9432108092.pdf
    • http://jjmcp.jp/userfiles/Image/file/lefizovu.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/r08joikkvuodsta5d37cge3314/garazixafovunepotadiwub.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/8b4mpbklm63r0l8kkgtlckka16/lolerefokisanebazididovu.pdf
    • http://www.aluvascientific.com/UserFiles/file/zikibedefesaji.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b499579fe---74603603667.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec76cd0a18---sugirugale.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/4ea0a6c7076e18e57e621e09cc564f26/45438519271.pdf
    • http://canoeing.by/pics/files/23639916505.pdf
    • http://orderkai.com/uploads/files/56402149393.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730afe64c74---sefolajajudamenibumulo.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae28a64df74---jiwejokur.pdf
    • http://decom.pro/admin/ckfinder/userfiles/files/56990994532.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e93d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE93D 16792 bytes
font_01_sfnt_off0001014f.bin
31f03a3db87ca9dffb09ce4aa0efd32b45619ab246262d46cfebb2fc12cb1fa5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1014F 16764 bytes
font_02_sfnt_off00012cd1.bin
505272995096f5f407d9e6341d5848ea4a1641c63e7811532d058e318c8d1d0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD1 10712 bytes