Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea520b4e78b642c7…

MALICIOUS

PDF

80.4 KB Created: 2021-06-28 01:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2af5fb6d6315b78625d903e0b99a3777 SHA-1: f674c3d6a6014fc3ee8b663add0e465b51dd34fb SHA-256: ea520b4e78b642c7d2eaad609ffb77821709d3513b2f7a88edd9f317ddad2ca4
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://desagresbrts.com/clients/34568/File/rinegugopulifofuzomoz.pdf In PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/97a4f7e969c8730881e6883ebe245b5f/10302013014.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/cba8e230511da85d6d335a0ad63bfeaa/xixevewetogujavubi.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/24151160382.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/sakub.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6963f05677---kepazidujofoxalopodifap.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b486cb98216---78780784271.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce5100f0f7---reruponavevokipanazorusej.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/wagizurexarelatoziru.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a824d183afbb90478ca3c13ec188e206/20388242549.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608723bd1967c---45338669066.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/15455564777.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/0221ab43d059a1b2629543ae6f304460/77656406603.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/lupagepusejefixedulik.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/k2r3sgv4o4r10udqo3jbpnk796/zeroxekegeboxikogik.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5dcaddb86b---74457770095.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2021.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/vufikokurusomomadabibise.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/ssliqn4rtn85rrm5i7p3td5c54/4236690182.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/sonezuvowitewalememema.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/a284bdc1d2e8952335d53d5ca4ecdaba/vowusebulapeniw.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/mutawagodatana.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/5ip2lhr949l4iuuscqltkm4aor/64424206876.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/fegodelagudilo.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a4784a8fe54---57196053172.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/80270156743.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/36396901538.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=eloy+reach+outPDF 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_off0000d89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89E 10160 bytes
SHA-256: 3b97bd656605e7da2452cc66eddb4a2c8af1e7ba37f6e18227d003f070e9611a
font_01_sfnt_off0000ef80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 17192 bytes
SHA-256: f5175421d6aecef81f69da5df5329d4c74c2220dbca223135cbf44bacd40a7ba
font_02_sfnt_off00011c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1