Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa65fd3f0901156…

MALICIOUS

PDF

89.4 KB Created: 2021-07-15 20:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a65769f01f2926e1f36bb69c2ff1e3c7 SHA-1: 86d90685f24575d3200bded4def142d0130bb9b6 SHA-256: 8aa65fd3f0901156f3062fe99f44dca58f1268542242a99467ca1c7c4e3b666a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress sites, likely intended to distribute further malicious content or engage in phishing. No scripts were extracted, but the presence of numerous external URIs suggests a role in a larger malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/186b1b3d02d0ff3b41a082ce12a6d436/lowewereropi.pdf In PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7da1ccf143---37185976879.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/d62c836966871f36e60d14994d33cd38/90537611436.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/rolofaxotadiso.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/fevusokirogexekozeziwuma.pdfIn PDF document text
    • http://aimic.com/userfiles/file/21975094784.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/fivimukesokipiv.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/55627293757.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/pke323il1jepepe9mb8j5ldqc5/dorurudifelarovu.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072b8e5d9250---vonozuzijosobijevutidiz.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/7vc3ajl880g2em6cbnlo5cge4b/12897796293.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/wugolevatanit.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa37868d04---42137529670.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/39372643262.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608216c8452eb---zuzowu.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/26015067957.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1607e979e266c4---45777626606.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/57500561015.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/purilisusisopem.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/8ilahglao5p3rogr7g7hrjsbo1/zogamidojugimisutapatamot.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/001026319d9749a41d03f98956c77387/gijewigagebewejurakosize.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=ginger+to+blonde+ombre+hairPDF 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_off0000f936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF936 17620 bytes
SHA-256: 50e18b29d41d3e8e877fcb831c4f76def7df39639c9b7c0e56f8b520630bb475
font_01_sfnt_off000126f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F0D 10708 bytes
SHA-256: abf66260e5868f55ff7cf07d9dcf00b205ccc328e33577181776d564caef2d7a

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