Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7e6641b696d80d…

MALICIOUS

PDF

85.5 KB Created: 2021-09-16 11:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dd41b417e166d7f6f174e9f6e13607d9 SHA-1: fb4fc74e26ce96293e81177c7953a363d339d049 SHA-256: 5d7e6641b696d80d954b1e037c1b898334d7e15ea1b18be9f6d3736d53c8fa24
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many of which point to PDFs hosted on disposable domains, indicating a link farm designed to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic to evade detection and distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://arendic.cl/files/83935558733.pdf In PDF document text
    • http://e-baze.lv/images/site/file/sovorefuxizexutedo.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/92082268448.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/zewavaga.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/goxuk.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613550bccebb1---71028111959.pdfIn PDF document text
    • http://jawarakreasi.com/file/12178903862.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/kogibaxevirinufasofisupib.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/zololotudejuxiligumu.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/42580150207.pdfIn PDF document text
    • http://asustainable.com/global/file/60686142196.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/4493de641203b00020cd1da6b399a7b1/54250136435.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/90086114770.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/56203058742.pdfIn PDF document text
    • http://av72-reklama.ru/userfiles/file/16304976428d7ce85fcfe945df787.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/daduzimobiromor.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/90589248261.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/31537432035.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/zazezepexine.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/63228151814.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/zitulomifo.pdfIn PDF document text
    • http://ort168.com/upload/ckeditor/files/5460710858.pdfIn PDF document text
    • http://zamaro.cz/images/fcke_files/file/73233770155.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/50804349519.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+check+sdk+version+in+android+phonePDF link annotation
    • 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_off0000e897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE897 17620 bytes
SHA-256: c71db9918ac42c52225e13c61baa52c2e480de94ea435bdf8130aa00072a0af0
font_01_sfnt_off000116ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC2 10800 bytes
SHA-256: 806829bf5df281bf000f8ec5ed3ab5ef45285cfc0375de4c657472d9521090cb

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