Malicious PDF — malware analysis report

Static analysis result for SHA-256 64962fa3ff810bc0…

MALICIOUS

PDF

79.1 KB Created: 2021-08-28 12:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bad4a0fde455abff4564c4a1abd87610 SHA-1: 90a889f93a18e41355833144849d534ccb1976a3 SHA-256: 64962fa3ff810bc0dc80744dbc9bdd9c4321010ff08b0bfc0b05a78529d91a08
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/ad176f7c3232c4ed24eb4e79ed27a7b7/96752398540.pdf In PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/08f6a2783e0bcd65aa109897f00a10e7/tejali.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/eabd1d33c20662d059acd43cbbd62c2f/28203551444.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c595b39588a---24172917496.pdfIn PDF document text
    • http://3dsami.org/uploadfilefiles/lojubu.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/83958696611.pdfIn PDF document text
    • http://rm-centr.ru/uploads/file/zidumiwuzijepugiluvopuro.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202108251316088091.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/161066dd25ea85---6966357637.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/mopilefofezedino.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/5f442510f5da4a20254c06db6fb2da97/37114522402.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/55739668689.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16077e1da31d5a---23704869969.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/tnv67qq3j637lcfchotcc376ie/jotoduxaxepiwo.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/tch1i6br96k2sosfi59q05bbi8/fafadopijuvesasixenilit.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/rogezirol.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/makinuvafuje.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/notinavudak.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/9ndmmmicd035ss6ta28fvglhh0/23742890632.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084b312f2c91---75168056680.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021081610594873499.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/5923f4607b1191599ece1bf9df9f38cb/nogobijujefalozuwutel.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/58784538807.pdfIn PDF document text
    • http://e-photo.lv/ckfinder/userfiles/files/18752510179.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/34645639338.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=function+of+acidophilsPDF 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_off0000d674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD674 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8B 10564 bytes
SHA-256: a449e2944f384c3973cd1934d0b07efa056f3dfd95d0a69fe8a6c4dfd594d65c
font_02_sfnt_off00010684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10684 15856 bytes
SHA-256: a45b2bfa7b5666f6c0b15a9c8c67893d3cf50a21c1ff7d86fc0ba5c69ca2fb19